From the Google Analytics Blog:
Have you ever wondered which other pages on the web link to your own? Wouldn’t it be nice to know which sites are talking about your content, and in which context? Well, a problem no more:now you can see all the backlink URL’s, post titles, and more right within the new Social reports.
The concept of trackbacks, a protocol by which different sites could notify each other of referencing links, first emerged back in 2002. Since then, the blogosphere has grown in leaps and bounds, but the requirement for each site to explicitly implement this protocol has always stood in the way of adoption. If only you could crawl the web and build an accurate link graph. The good news is we already do that at Google, and are now providing this insight to Google Analytics users.
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