Karma are the negative and positive consequence of ones actions.
This site is a perfect example for that.
In this site you can affect the Karma of another forum-member.
Just click the "user rating" icon on the member and you can change their Karma.
But this is only done when you have a good reason for changing his or her Karma.
In the same way, our soul also accumulates those Karmic points or charges
assigned to us by the people we deal with in this life.
We are not aware of it(Karma points) though but it is there.
So watch out!