Twitter may not have a wider reach than Facebook, more U.S mobile users than Instagram, or more social TV activity than Tumblr. But the blue bird reportedly excels in driving app downloads through its ad platform, especially lifestyle apps. Its ability to engage with users in real-time is evidently a contributing factor in this advantage over other social media platforms. In addition, Twitter is also really good at mobile retargeting, which enables marketers to retarget users who have already downloaded an app and may not have opened it in a while. With the vast capital pouring into social media marketing today, these two specialties will sure lend Twitter some advantage in this fierce competition.