The User Reputation system allows board members to leave comments about one another’s posts thereby contributing to a members overall 'reputation'.

Users gain and lose reputation based on how their posts are scored by other forum participants. Users with the ability to affect reputation, will either give or take away points by approving or disapproving a post's content.

If you like (or dislike) what someone did or posted, you can affect reputation by voting on the post with the icon.

A user’s reputation is visible on the right side of the post header (The thingies). You can also gain reputation by contributing to the forum and simply being a member for an extended period of time.