Over the past few months, Google's been building up Hotpot, a feature in its Maps and Places tool that recommends places you'll like based on your ratings of similar places (and your friends' ratings, too).
Currently, it's available on iPhone, Android and through your browser at google.com/hotpot and on Google Maps. Today, however, they've added Hotpot to regular Google search, meaning when you search for, say, restaurants in your area, you'll see if a particular restaurant is recommended to you because you rated a similar restaurant highly. In addition, if a friend of yours has rated a restaurant highly on Hotpot, it'll let you know right under the search result.
Hit the link to read more, and check out the video for a simple explanation of how Hotpot works. [Official Google Blog]