I know that the HTML tag is used for attatching stylesheets, but looking at the W3CSchools tag reference, it has many other values for the rel attribute. I\'ve looked
I know two prominent common uses:
With rel="stylesheet" to reference external CSS style sheets
With rel="favicon" to reference browser favicons
Additionally, there are
Forward and reverse links (rel="next")
Links to alternative resources for search engines (rel="alternate")
Check the W3C Reference: Links in HTML documents for details on stylesheet, and the latter two.