i am trying to improve my site's search engine presence now that i have started my beta launch. one thing i notice from many sites, especially many social networking sites, is that the link in the search results show the user's username or name on that site in the link. then, when you click it, you are taken to a preview of that user's profile.
example: if you do a google search for toby jackson (just randomly picked this name, sorry toby). you should see something like this towards the bottom of the first page of results: Toby Jackson | Facebook.
i think i understand why the Toby Jackson | Facebook shows up, they must have something like this in the title tag right?
<?php echo $username;?> | Facebook
my main question is how do they(Facebook in this example) make that link to a preview of Toby Jackson? How are they passing the variables in the link?