This may be a very elementary question, but how does a site go about optimizing how it looks in google's search results? For example:
http://imgur.com/0eVWx
That isn't just a link with some text. That's a link, text, and options. Plus a search bar. I looked at the source of the page crawled by google but couldn't see any special META tags or anything. Can someone explain this to a newbie?