Here's some information about the new feature:
Facebook Live is available to Pages, profiles and public figures on iOS, Android and Facebook Mentions.
Tap the live video icon to start the video. While the video stream is running, you can see exactly how many live viewers you have.
During the broadcast, the video will appear on the start page or in your timeline.
Live videos can be a maximum of 90 minutes long.
Once the stream has finished, the video is saved in the Facebook timeline so that all your friends and followers can access your videos at any time.
You can tap on "Subscribe" to receive a message the next time a live broadcast is started via a specific Facebook account.
It's best if you have a Wi-Fi connection, but 4G works too.
Discover Facebook Live and reach new potential followers!