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「WordPress の検索エンジン最適化 (SEO)」の版間の差分

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このページは https://ja.wordpress.org/support/article/search-engine-optimization/ へ移動しました。
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WordPress はインストールするだけでも検索エンジンと相性が良い状態になっています。デフォルト機能により、検索エンジンが個別投稿・固定ページ・カテゴリーなどをクロールして情報を検索データベースに含めやすいようになっています。
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WordPress にはビルトイン検索エンジン最適化(SEO)ツールが含まれています。[[Glossary#.htaccess|.htaccess]] を使った、「[[Using Permalinks|パーマリンク]]」と呼ばれるきれいな [[Glossary#URI and URL|URL]] の生成、[[Glossary#Blogroll|ブログロール(サイドバーのリンク集)]]作成機能、そして [[Glossary#PingBack|Ping(ピンバック)]]の送信などです。他にも SEO に使える多数のサードパーティ[[プラグイン]]があります。
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しかし、さまざまな [[Using Themes|WordPress テーマ]]を使ったり、自身の目的に合わせて [[Blog_Design_and_Layout|WordPress をカスタマイズ]]し始めると、検索エンジンにフレンドリーなデフォルト機能が動作しなくなってしまう恐れがあります。WordPress サイトが検索エンジンのスパイダーやクローラーに対して最もフレンドリーな状態を保つためには、以下のようなことに気をつけてください。
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;正しくクリーンなコード: Make sure your site's code [[Validating_a_Website|validates]]. Errors in your code may prevent a search engine from moving through the site successfully.
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;コンテンツに「会話」させる: Search engines can't "see" a site.  They can only "read" a site.  Pretty does not talk to a search engine.  What "talks" to a search engine are the words, the content, the material in your site that explains, shares, informs, educates, and babbles. Make sure you have quality '''word''' content for a search engine to examine and compare with all the parts and pieces to give you a good "score".
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;検索のことを考えてコンテンツを書く:How do you find information on the Internet? If you are writing something that you want to be "found" on the Internet, think about the words and phrases someone would use to find your information. Use them more than once as you write, but not in every sentence. Learn how search engines scan your content, evaluate it, and categorize it so you can help yourself get in good favor with search engines.
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;コンテンツ・ファースト(まずコンテンツありき):A search engine enters your site and, for the most part, ignores the styles and [[CSS]].  It just plows through the site gathering content and information. Most WordPress Themes are designed with the content as close to the top of the unstyled page as possible, keeping sidebars and footers towards the bottom. Few search engines scan more than the first third of the page before moving on.  Make sure your Theme puts the content near the top.
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;キーワード・リンク・タイトルとコンテンツのマッチング :Search engines do not evaluate your site on how pretty it is, but they do evaluate the words and put them through a sifter, giving credit to certain words and combinations of words. Words found within your document are compared to words found within your links and titles.  The more that match, the better your "score."
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;リンク・画像内のコンテンツ :Your site may not have much text, mostly photographs and links, but you have places in which to add textual content. Search engines look for <tt>alt</tt> and <tt>title</tt> in link and image tags.  While these have a bigger purpose of making your site more accessible, having good descriptions and words in these attributes helps provide more content for search engines to digest.
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;リンク・ポピュラリティ:It is not how good your site is, it is how good the sites are that link to you. This still holds weight with search engine favoritism. It's about who links to you. [[Glossary#Blogroll|Blogrolls]], [[Glossary#PingBack|pingbacks]], and [[Glossary#Trackback|trackbacks]] are all built into WordPress. These help you link to other people, which gives them credit, but it also helps them link to you, connecting the "links." The number of incoming links your site has that have been recognized by Google can be checked by typing <tt>link:www.yoursite.com</tt> into Google (other search engines have similar functions).  Other ways to generate incomming links to your site include:
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::*Add your site's url to your signature on forum posts on other sites.
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::*Submit your site to directories (see below).
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::*Note: Leaving comments on blogs will not help with this, since all modern blogging tools use the [[Nofollow|rel="nofollow"]] attribute. Don't be a [[Comment_Spam|comment spammer]].
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;適切なナビゲーションリンク:A search engine crawls through your site, moving from page to page. [[Good_Navigation_Links|Good navigational links]] to the categories, archives, and various pages on your site will invite a search engine to move gracefully from one page to another, following the connecting links and visiting most of your site.
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==検索エンジンサイトへの申請<div id="Search_Engine_Site_Submissions"></div>==
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There are many resources that will "help" you submit your site to search engines. Some are free, some for a fee. Or you can manually submit your site to search engines yourself. Whatever method you choose to use, once your site has been [[Validating_a_Website|checked for errors]] and is ready to go, search engines will welcome your WordPress site.
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Here are some tips for successful site submissions:
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* Make sure you have content for search engines to scan. In general, have more than 10 posts on your site to give the search engines something to examine and evaluate.
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* Do not submit your site to the same search engine more than once a month or longer, depending upon their criteria, not your anxiousness to be listed.
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* Have ready to type, or copy and paste, a description of your site that is less than 200 words long, the title of the site, and the categories your site may belong to in a search engine directory.
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* Have a list of your website's various "addresses/URLs" ready. You can submit your root directory as well as specific categories and feeds to search engines, expanding your search engine coverage.
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* Keep a list of the various search engines and directories you submit to so you do not accidentally resubmit too soon, and you can keep track of how they include you among their pages and results.
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=== ディレクトリサイト===
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It is also useful for traffic generation and search optimization purposes to submit your site to directories. Both comprehensive directory sites and those specific to the subject or localisation of your site can be used.
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[http://www.dmoz.org DMOZ.org] this is the most important directory. Its content is licensed in an open fashion, allowing it to be syndicated through out the web. Its content is also used directly in some fashion by almost all of the major search engines.
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==検索エンジン最適化リソース <div id="Search_Engine_Optimization_Resources"></div>==
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While WordPress comes ready for search engines, the following are more resources and information you may want to know about preparing and maintaining your site for search engines' robots and crawlers.
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=== メタタグ<div id="Meta_Tags"></div> ===
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[[Meta Tags in WordPress|Meta Tags]] contain information that describes your site's purpose, description, and keywords used within your site.  The meta tags are stored within the <tt>head</tt> of your <tt>header.php</tt> template file.  By default, they are not included in WordPress, but you can manually include them and the article on [[Meta Tags in WordPress]] takes you through the process of adding meta tags to your WordPress site.
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The WordPress [[カスタムフィールドの使い方|Custom Fields]] option can also be used to include keywords and descriptions for [[Write_Post_SubPanel|posts]] and [[Pages]]. There are also several WordPress Plugins that can also help you to add meta tags and keyword descriptions to your site found within the [http://wordpress.org/extend/plugins/ Official WordPress Plugin Directory].
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===Robots.txt の最適化 <div id="Robots.txt_Optimization"></div>===
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Search Engines read a yourserver.com/robots.txt file to get information on what they should and shouldn't be looking for, and where. 
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Specifying where search engines should look for content in high-quality directories or files you can increase the ranking of your site, and is recommended by [http://www.google.com/support/webmasters/bin/answer.py?answer=35769 Google] and all the search engines.
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An example [http://www.askapache.com/seo/updated-robotstxt-for-wordpress.html WordPress robots.txt] file:
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<pre>
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User-agent: *
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Disallow: /cgi-bin
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Disallow: /wp-admin
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Disallow: /wp-includes
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Disallow: /wp-content/plugins
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Disallow: /wp-content/cache
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Disallow: /wp-content/themes
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Disallow: /trackback
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Disallow: /feed
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Disallow: /comments
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Disallow: /category/*/*
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Disallow: */trackback
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Disallow: */feed
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Disallow: */comments
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Disallow: /*?*
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Disallow: /*?
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Allow: /wp-content/uploads
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# Google Image
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User-agent: Googlebot-Image
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Disallow:
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Allow: /*
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# Google AdSense
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User-agent: Mediapartners-Google*
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Disallow:
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Allow: /*
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# digg mirror
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User-agent: duggmirror
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Disallow: /
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Sitemap: http://www.example.com/sitemap.xml
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</pre>
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==== 関連記事 <div id="See_also:"></div> ====
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* [http://wordpress.org/extend/plugins/kb-robotstxt/ KB Robots.txt plugin for WordPress](プラグイン)
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* [http://www.google.com/support/webmasters/bin/topic.py?topic=8843 How Google Crawls My Site]
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* [http://www.google.com/support/webmasters/bin/answer.py?answer=40360 How do I use a robots.txt file to control access to my site?]
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* [http://www.askapache.com/seo/seo-with-robotstxt.html Using robots.txt for SEO]
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* [http://www.markwilson.co.uk/blog/2007/04/removing-duplicate-search-engine-content-using-robotstxt.htm Removing duplicate search engine content using robots.txt]
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* [http://www.robotstxt.org/wc/robots.html The Web Robots Pages]
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* [http://ja.wikipedia.org/wiki/Robots.txt wikipedia - Robots.txt](Wikipedia 日本語版)
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* [http://www.cogentos.com/bloggers-guide-to-using-robotstxt-and-robots-meta-tags-to-optimise-indexing/ Bloggers Guide To Using Robots.txt And Robots Meta Tags]
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===フィードの送信<div id="Feed_Submissions"></div>===
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WordPress comes built-in with various [[WordPress Feeds|feeds]], allowing your site to be viewed by various feed readers.  Many search engines are now accepting feed submissions, and there are many site which specialize in directories of feeds and feed services.
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To submit your site's feeds, you need to know the link to the various feeds your site provides.  The article [[WordPress Feeds]] lists the various links of the feeds that come built into WordPress.
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For information on customizing these links, see the article on [[Customizing Feeds]].
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* [http://pingomatic.com/ Pingomatic]
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* [http://www.mypagerank.net/service_pingservice_index MyPagerank]
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* [http://feedshark.brainbliss.com/ Feed Shark]
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* [http://www.masternewmedia.org/rss/top55/ Robin Good's RSSTop55 - Best Blog Directory And RSS Submission Sites]
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* [http://www.aripaparo.com/archive/000632.html Ari Paparo's Big List of Blog Search Engines and Feed Services]
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* [http://www.instant-info-online.com/wordpress-compressed-all-inclusive-ping-list.html Wordpress compressed all inclusive ping list]
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<!-- Technorati は日本ではあまり使われていないので隠す
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===Technorati Tags===
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[http://www.technorati.com/ Technorati] is a "real-time search engine that keeps track of what is going on in the blogosphere — the world of weblogs." According to the site, "Technorati tracks the number of links, and the perceived relevance of blogs, as well as the real-time nature of blogging. Because Technorati automatically receives notification from weblogs as soon as they are updated, it can track the thousands of updates per hour that occur in the blogosphere, and monitor the communities (who's linking to whom) underlying these conversations."
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[http://www.technorati.com/tag/ Technorati tags] are used to categorize the different topics and information used by blogs.  Technorati uses WordPress categories as tags automatically.  You can [http://www.technorati.com/help/tags.html add more tags] by adding a <tt>rel="tag"</tt> to any link on your site.  For example:
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<pre>
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<a href="http://wordpress.org/" rel="tag">WordPress</a>
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<a href="http://codex.wordpress.org/" rel="tag">Codex</a>
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</pre>
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There are also several WordPress plugins for maximizing Technorati tags on the [[Plugins/Technorati|Plugins - Technorati]] list.
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'''Note:''' In WordPress v1.5.x, Technorati will automatically recognize your category names as tags.  For more info, see: [http://www.tomrafteryit.net/wordpress-categories-technorati-tags-and-search-engine-optimisation/ WordPress Categories, Technorati Tags and Search Engine Optimisation]
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'''Note:''' For optimal Technorati listing, you should include the Atom feed in the header of your theme. For this you may use the following code, which you can add somewhere between the <tt><head></tt> and <tt></head></tt> tags:
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<pre>
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<link rel="alternate" type="application/atom+xml"
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title="Atom 0.3" href="<?php bloginfo('atom_url'); ?>" />
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</pre>
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Without adding the Atom feed to your header, your posts in Technorati will most likely be displayed wrongly. Which can result in the post content on Technorati duplicating the post title and listing other (meta) information, which is displayed between the post title and the real post content on your weblog.
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-->
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=== パーマリンク<div id="Permalinks"></div> ===
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[[Introduction_to_Blogging#Pretty_Permalinks|Permalinks]] are enhancements to your existing URLs which can improve search engine optimization by presenting your post, page, and archive URLs as something like <tt><nowiki>http://example.com/2003/05/23/my-cheese-sandwich/</nowiki></tt> rather than <tt><nowiki>http://example.com/index.php?p=423</nowiki></tt>.  See [[Using Permalinks]] for more information.
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As search engines use links and the <tt>title</tt> as part of their information gathering, links to posts and articles within your site gain importance with Permalinks.
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関連:
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* [http://www.tomrafteryit.net/boost-search-engine-optimisation-seo-using-permalinks/ Boost Search Engine Optimisation (SEO) using Permalinks]
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* [http://www.deanlee.cn/wordpress/permalinks-migration-plugin/ Permalinks Migration Plugin]With this plugin, you can safely change your permalink structure without breaking the old links to your website.
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As an added bonus, enable the [http://scott.yang.id.au/2005/05/permalink-redirect/ Permalink Redirect plugin].  This plugin "replies a 301 permanent redirect, if request URI is different from entry’s (or archive’s) permalink. It is used to ensure that there is only one URL associated with each blog entry."
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=== サイトマップ<div id="Sitemaps"></div> ===
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A ''sitemap'' or "site map" is a single page listing of all the posts on your website. It is intended for your visitors to get a good overview on what your site is about and to find a blog post quickly but it also has great benefits in the search engines as a good link is always pointing to all your blog posts. By having a link to your sitemap on all your sites pages both visitors and search engines will easily get to it and find all your posts.
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Here is a tutorial with three different examples of sitemaps with demos and how to set them up:
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* [http://www.jimwestergren.com/tutorial-automatic-sitemap-in-wordpress/ Tutorial: Automatic Sitemap for WordPress]
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=== Google サイトマップ<div id="Google_Sitemaps"></div> ===
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As of June 2005, Google is now accepting '''sitemaps''' of your site as part of their website submissions. Google needs to have this sitemap formatted in a special way using XML. You can find more information about [https://www.google.com/webmasters/sitemaps/login Google's Sitemap Submissions] from Google, and the discussion on the [http://www.wordpress.org/support WordPress Forum] about [http://wordpress.org/support/topic/35465 WordPress and Google Site maps]. 
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Some utilities have been created to help the WordPress user to create a Google site map of their site for submission to Google.  For more information on these and Google sitemaps:
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* [http://sitemaps.blogspot.com/ Inside Google Sitemaps (Official Google Blog)]
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* [http://www.arnebrachhold.de/2005/06/05/google-sitemaps-generator-v2-final Google Sitemap Generator Plugin for WordPress]
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*[http://blog.leion.net/2006/06/02/adding-human-readable-google-sitemap/ Make your sitemap human readable]
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*[http://andreasjuch.mywol.org/mediawiki/Google_Sitemap_Generator_for_WordPress Simple Sitemap Generator]
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*[http://www.dicontas.co.uk/blog/google-sitemap-utw-tag-wordpress-plugin/ Google Sitemaps - UltimateTagWarrior Tag Plugin Addon]
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===リンクの関連性 <div id="Link_Relationships"></div>===
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There is some debate over whether listing the link relations actually effect search engine ranking however it is simple to implement.
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*[http://www.w3.org/TR/REC-html40/struct/links.html#h-12.1.2 World Wide Web Consortium (W3C)]
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*[http://xmouse.ithium.net/essays/linkrels-another-wordpress-plugin/ Linkrel Plugin]
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*[http://boxofchocolates.ca/archives/2004/06/12/link-relationship-plugin-for-wordpress Link rel Plugin]
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*[http://blog.noontide.ca/2006/03/29/wordpress-link-rel-next-prev-index/ Theme Code]
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== その他のリソース・チュートリアル<div id="More_Resources_and_Tutorials"></div> ==
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There is a lot to learn about search engine optimization and site submission.  Here are just a few sites to help you learn more about how this works:
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* [http://www.seobook.com/bloggers The Blogger's guide to SEO]
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* [http://www.seomoz.org/article/beginners-guide-to-search-engine-optimization Beginners Guide to Search Engine Optimization]
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* [http://yoast.com/articles/wordpress-seo/ WordPress SEO - The Definitive Guide to Higher Rankings for your Blog]
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* [http://yoast.com/wordpress-seo-video/ WordPress SEO] - Presentation by Joost de Valk
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* [http://www.jimwestergren.com/seo-for-wordpress-blogs/ SEO for WordPress Blogs - The Complete Guide ]
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* [[WordPress_Lessons#Website_Development|More WordPress Codex Articles on Website Development]]
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* [http://www.searchtools.com/robots/ All About Search Indexing Robots and Spiders]
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* [http://www.tomrafteryit.net/boost-search-engine-optimisation-seo-using-permalinks/ Boost Search Engine Optimization (SEO) Using Permalinks]
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* [http://www.easywebtutorials.com/blogging-tutorial/diy/ Search Engine Optimized WordPress Themes]
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*[http://www.cameraontheroad.com/index.php?p=193 Getting Ready for Search Engine Submissions]
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* [http://www.iprospect.com/search-engine-marketing-university/ iProspect Search Engine Marketing University]
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* [http://www.jafsoft.com/searchengines/webbots.html Search Engine Robots that Search Your Site ]
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* [http://www.clickz.com/search/results/article.php/3291021 Understanding Search Results Pages]
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* [http://www.cameraontheroad.com/index.php?p=204 Website Development Step-by-Step]
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* [http://www.geek-notes.com/wordpress/25/optimize-wordpress-for-search-engines/ SEO For Wordpress Tips]
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* [http://www.akamarketing.com/blog/30-wordpress-search-engine-optimization-without-code-modification.html Wordpress search engine optimization without code modification]
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* [http://www.dicontas.co.uk/blog/google-to-yahoo-msn-sitemaps-creator-tool-page/    Google to Yahoo MSN Sitemaps Creator Tool]
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* [http://www.johntp.com/2006/09/12/wordpress-plugins-needed-to-optimize-your-blog-for-search-engines/ Search Engine Optimization plugins for WordPress]
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*[http://www.indiana-loans.co.uk/wordpress-plugin-seo-alt-tag-optimzer-font-resizer-tool/  SEO ALT Tag Optimization]
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* [http://www.scoutblogging.com/2007/08/how_can_i_drive_more_traffic_t.html How Can I Drive More Traffic to My blog? (13 tips) ]
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* [http://www.webhelpermagazine.com/2007/10/using-headspace-wordpress-plugin-for-seo/ Two Part Tutorial on SEO using the HeadSpace Plugin for WordPress]
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* [http://www.cogentos.com/does-silo-site-structure-work-for-wordpress/ Wordpress Silo Site Structure]
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* [http://blogbuildingu.com/whitehat-seo-bloggers Blog SEO - Whitehat SEO for Bloggers in a Nutshell]
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* [http://www.prelovac.com/vladimir/seo-for-wordpress-page-sculpting WordPress SEO techniques - Page sculpting]
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{{原文|Search Engine Optimization for WordPress|106699}}<!-- 2011-06-28T11:06:49 MichaelH 版 -->
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[[en:Search Engine Optimization for WordPress]]
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[[Category:WordPress レッスン]]
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2021年8月27日 (金) 23:52時点における最新版

このページは https://ja.wordpress.org/support/article/search-engine-optimization/ へ移動しました。