Explore Live Streaming with Google/YouTube
This article, part of the YouTube Creator Academy, gives a great overview of the value you'll get by putting on Live Video Broadcasts.
It discusses the use of Hangouts on Air as well as YouTube Live Events. It stresses the value of the broadcasts as they relate to your fans and viewers.
There is a quick quiz at the end if you want to test what you learned (sign in first to keep the score), and takes about 15 minutes to read and take the quiz on average.