
Moments is about six months old, and it took a long time to gain traction, but now it's one of the top downloaded photo apps for iPhone.
Part of that is because Facebook is forcing some users to download Moments if they want to save their old synced photos. But a lot of it is just people sharing to each other so more people have to download it.
Here's a breakdown of how to use Moments so you know how to share privately and publicly when you want to.