[[["わかりやすい","easyToUnderstand","thumb-up"],["問題の解決に役立った","solvedMyProblem","thumb-up"],["その他","otherUp","thumb-up"]],[["必要な情報がない","missingTheInformationINeed","thumb-down"],["複雑すぎる / 手順が多すぎる","tooComplicatedTooManySteps","thumb-down"],["最新ではない","outOfDate","thumb-down"],["翻訳に関する問題","translationIssue","thumb-down"],["サンプル / コードに問題がある","samplesCodeIssue","thumb-down"],["その他","otherDown","thumb-down"]],["最終更新日 2013-05-01 UTC。"],[[["\u003cp\u003eUsing \u003ccode\u003erel=canonical\u003c/code\u003e helps search engines understand which version of a page to index when dealing with duplicate content, consolidating properties like inbound links.\u003c/p\u003e\n"],["\u003cp\u003eAvoid common mistakes like incorrectly applying \u003ccode\u003erel=canonical\u003c/code\u003e to paginated series, using relative URLs instead of absolute URLs, unintended or multiple declarations, applying it from category pages to featured articles, and placing it in the \u003ccode\u003e<body>\u003c/code\u003e instead of the \u003ccode\u003e<head>\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003eEnsure the canonical version contains a large portion of the duplicate's content, the target URL exists and doesn't have a noindex tag, you prefer the canonical URL for display, and it's specified only once in the \u003ccode\u003e<head>\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003eFor category or landing pages, avoid pointing \u003ccode\u003erel=canonical\u003c/code\u003e to a featured article to ensure both remain visible in search results.\u003c/p\u003e\n"],["\u003cp\u003eDouble-check your implementation by examining the page's source code, especially when using templates or SEO plugins, to prevent unintended canonicalization.\u003c/p\u003e\n"]]],["The core content discusses the `rel=canonical` link tag, which helps search engines identify the preferred version of duplicate pages. Key actions include: ensuring significant content overlap between duplicate and canonical pages, verifying the canonical URL's validity and lack of `noindex`, using absolute URLs, and avoiding multiple or unintended declarations. Common mistakes to avoid: canonicalizing paginated series to the first page, linking from category to featured articles, and placing `rel=canonical` in the `\u003cbody\u003e`. It should be declared only once within the `\u003chead\u003e`.\n"],null,[]]
