Hi, could anyone please explain to me that points/stars system to me? Thanks 
Are you talking about the stars under your name?
That is just the post count. It will increase the more you post. People with more stars post more content.
There are some exceptions, however. For instance; administrators, moderators, services, and the wiki staff have custom badges. This replaces the stars under their name.
Yeah I saw my stars went up on my 25th post. Thanks for the info.