Now Playing: 01-17-14 Marketplace Tech -

It's Friday, which means it's time for our weekly numbers game, Silicon Tally. This week we play with Marketplace technology reporter Queena Kim. And Facebook is taking a page out of Twitter's book. Facebook will now offer users a list of trending topics, so they can track what folks are posting about. It'll roll out to American accounts in the coming weeks, tailored to user interest and location.