Google has recently added a new feature to its search results. Users will now see if a someone they follow on Twitter has shared a link in the search results. It looks something like this:
Google uses the links people share in your Twitter feed to provide users with better results. It can help a user decide which link to click on, based on the people they follow on Twitter. If I usually like content from a certain user, and I see that they shared it in a search result, it would be more likely that I click on a link if I see that user shared it as well.
Bing recently did something similar with Facebook, where a user will see if a friend has liked a link in the search results.