Rel="tag" use to describe relation between current page to linked page, it very important HTML tag. Google search engine use Rel="canonical" and rel="nofollow/follow" for finding relation between webpages.| Value | Description |
|---|---|
| alternate | Links to an alternate version of the document (i.e. print page, translated or mirror). Example: <link rel="alternate" type="application/atom+xml" title="W3Schools News" href="/blog/news/atom"> |
| author | Links to the author of the document |
| help | Links to a help document. Example: <link rel="help" href="/help/"> |
| icon | Imports an icon to represent the document. Example: <link rel="icon" href="/favicon.ico" type="image/x-icon"> |
| license | Links to copyright information for the document |
| next | Indicates that the document is a part of a series, and that the next document in the series is the referenced document |
| prefetch | Specifies that the target resource should be cached |
| prev | Indicates that the document is a part of a series, and that the previous document in the series is the referenced document |
| search | Links to a search tool for the document |
| stylesheet | URL to a style sheet to import |
| follow | Links to an unendorsed document, like a paid link. ("nofollow" is used by Google, to specify that the Google search spider should not follow that link) |
| canonical | canonical rel tag use by Google Search Engine for handling duplicity in Dynamic website |
