Kells, the karma rating is simply a way to show popularity and whether people like what you are posting for whatever reasons they may have. You click on 'applaud' if you like what you read and 'smite' if you don't. The number of each is then continually tallied. I don't think many people actually use this function. I have a few times and you can see by my karma count I have been applauded a few times, which is always nice ;)Hope that was clear.