The query link:URL shows pages that point to that URL. For example, to find pages that point to Google Guide's home page, enter: [ link:www.googletruths.com ]

Note: According to Google's documentation, "you cannot combine a link: search with a regular keyword search."

Also note that when you combine link: with another advanced operator, Google may not return all the pages that match. The following queries should return lots of results, as you can see if you remove the -site: term in each of these queries.

Find links to the Google home page not on Google's own site. [ link:www.google.com -site:google.com ]