You stream your game online for people to watch.
For example my twitch is twitch.tv/jbrap
If I'm streaming people would be able to go to the url I posted to view my game live.. similar to YouTube people can subscribe or follow your channel and get updated everytime you're streaming.
Do people watch anyway even if you just post a random gaming stream ? I don't have that many people on my psn they are over on the
More fun system