You could have asked that in your other topic. Let me tell you all about rep to help you understand. Rep is short for reputation. You give rep to people who have said something smart or has done something that is very helpful. You give rep by clicking the little box with the check and the x. You click that one on the post of the person who did something great. Then at your control panel it show who gave you rep. Thats it. And if enough people give you rep, you little number and block next to your rep power box (on you bio in your post) will go up. The number can go up or the box can go green. Rep is to tell who is respected member. I believe mods can give bad rep. Not sure. There, Now you know. PM me if you have more questions.