What popular streaming service, launched in June 2011, allows content creators to stream video games while chatting with viewers?

Twitch streaming had surpassed HBO Go, HBO’s online service, in terms of traffic by 2014. In the mid-2010s, the practice gained traction on US-based sites like Twitch and, later, YouTube, Facebook, and China-based sites like Huya Live, DouYu, and Bilibili.