Reputation is a way of giving an extended thanks or no thanks for a meaningful, helpful, and thoughtful post or a post you have taken offense to or just flat out dislike. Reputation is the WPA in your profile on the left. Those little green bars in your profile indicate your level of reputation, in some cases they will be red bars if the member has received substantial negative rep or gray? for the middle. You can access your reputation at the top of any page by clicking on settings. To give reputation to another member, click on the scales icon at the bottom of any post. Please do not abuse the reputation system.