sentences:  In May 2013, it launched Twitter Amplify – an advertising product for media and consumer brands.With Amplify, Twitter runs video highlights from major live broadcasts, with advertisers' names and messages playing before the clip.By February 2014, all four major U.S. TV networks had signed up to the Amplify program, bringing a variety of premium TV content onto the social platform in the form of in-tweet real-time video clips.