Means just what it says, focus points... areas you can select for it to focus on.
This allows you to override what the camera 'thinks' should be the focus for example. If there's a person in front of me and a waterfall behind them the camera may want to focus on the person (nearest object), however if I want the waterfall in focus I can move the focus point to the waterfall.
Might be a bad example but hopefully you get the idea.
Thank you! Completely without any idea or with a different idea.