I am new in this community so i didn`t undestand the reason of earning those “points”
There’s a Points Items of the LPU store. When you earn enough points, you can use them towards an item of your choosing. It might not look like there’s a lot there, but that’s subject to change at any given time.
OK thanks, it`s an interesting mecanism for a “social web page” 
oki good to know 