Qualify Outbound Links for SEO | Google Search Central | Documentation | Google for Developers (original) (raw)
For certain links on your site, you might want to tell Google your relationship with the linked page. In order to do that, use one of the following rel attribute values in the <a> tag.
For regular links that you expect Google to fetch and parse without any qualifications, you don't need to add a rel attribute. For example:
My favorite horse is the palomino.
For other links, use one or more of the following values:
| rel values | |
|---|---|
| rel="sponsored" | Mark links that are advertisements or paid placements (commonly called paid links) with the sponsored value. Read more about Google's stance on paid links. <a **rel="sponsored"** href="Appenzeller" title="undefined" rel="noopener noreferrer">https://cheese.example.com/Appenzeller\_cheese">Appenzeller |
| rel="ugc" | We recommend marking user-generated content (UGC) links, such as comments and forum posts, with the ugc value. <a **rel="ugc"** href="Appenzeller" title="undefined" rel="noopener noreferrer">https://cheese.example.com/Appenzeller\_cheese">Appenzeller If you want to recognize and reward trustworthy contributors, you might remove this attribute from links posted by members or users who have consistently made high-quality contributions over time. Read more about how toprevent user-generated spam your site and platform. |
| rel="nofollow" | Use the nofollow value when other values don't apply, and you'd rather Google not associate your site with, or crawl the linked page from, your site. For links within your own site, use therobots.txt disallow rule. <a **rel="nofollow"** href="Appenzeller" title="undefined" rel="noopener noreferrer">https://cheese.example.com/Appenzeller\_cheese">Appenzeller |
| Multiple values | You may specify multiple rel values as a space- or comma-separated list. Examples: I love <a **rel="ugc nofollow"** href="Appenzeller" title="undefined" rel="noopener noreferrer">https://cheese.example.com/Appenzeller\_cheese">Appenzeller cheese. I hate <a **rel="ugc,nofollow"** href="Blue" title="undefined" rel="noopener noreferrer">https://cheese.example.com/blue\_cheese">Blue cheese. |
Links marked with these rel attributes will generally not be followed. Remember that the linked pages may be found through other means, such as sitemaps or links from other sites, and thus they may still be crawled. These rel attributes are used only in elements that Google can crawl, except nofollow, which is also available asrobots meta tag.
If you need to prevent Google from fetching a link to a page on your own site, use therobots.txt disallow rule.
To prevent Google from indexing a page, allow crawling and use thenoindex robots rule.