phranque - 1:39 am on Oct 23, 2012 (gmt 0)

what's the use of putting information in a <link>?

do you mean the title attribute on the link?

http://www.w3.org/TR/html401/struct/global.html#title

Values of the title attribute may be rendered by user agents in a variety of ways. For instance, visual browsers frequently display the title as a "tool tip" (a short message that appears when the pointing device pauses over an object). Audio user agents may speak the title information in a similar context. For example, setting the attribute on a link allows user agents (visual and non-visual) to tell users about the nature of the linked resource