Okay - I'm trying to figure this out so bear with me. I'm not really sure about them but we ALL have some!
We start out with 10 points. I don't know why. We can get more "points" when someone "votes" on our post. If they like it we get a + point & if not we get a - point.
To vote on a post you click on the little "scale" icon on the right hand side of the bar above the post. You can also view the reputation there I think.
I'm not sure of the significance of the points/reputation but I guess we're supposed to use it.
If I get any more info I'll post it here ok?