If you're anything like a billion other people out there, you've checked Facebook (META 0.73%) recently. While cruising the social media site, you may have noticed the newest feature: Graph Search. In this video, Motley Fool blog editor Mark Reeth will discuss the new search function as well as Facebook's big mobile moves, and what competitors Google (GOOGL 0.54%) and LinkedIn (LNKD.DL) are doing to stay ahead of the game. Will Google be able to hold Facebook off as the social media giant intrudes on its search turf? Will LinkedIn be able to make a successful transition to mobile? Watch the video and find out!