Now, at first, when someone views the tool, it's about webmasters backlink checking right? That's what i assumed and so i checked my backlinks and so on... then i incorrectly typed a web address without the .com suffix and guess what came up? some listings most people will refer as search results however it isnt usual search results, seems to be pretty precise results.
try it out for yourself -- on the above tool type in "photoshop-tutorials" or "webmaster-tools" and some pretty good results show up.