Twitter has been building clout as an advertising platform for all of 2013, and their acquisition of startup MoPub is another piece of the puzzle. MoPub helps mobile publishers manage their ad inventory, and by owning them, Twitter has shown an increased focus on revenue generation. This acquisition will serve to maximize Twitter’s own ad space, increasing the effectiveness of ads running across the entire platform, but will also add revenue from other companies using MoPub’s service to develop native advertising strategies, like WordPress, Flixter, Ngmoco, and OpenTable.