nice
Karma (displayed in the Statistics section on user's profile) is a rough representation of the value of actions the person took in the past.
A new account starts with 0 karma and certain actions can increase or decrease it. The karma system is not finalized and it will be adjusted in the future to reward friendly and helpful people and limit the damage trolls can do.
There are multiple ways how to gain karma, for example:
There are also ways to lose karma. Being rude, spamming, posting garbage comments, picking irrelevant tags for your sets, breaking copyright, basically anything that lowers the quality of the web may result in negative karma.
Some actions require a minimum karma, for example:
The amount of karma you have influences how effective your upvoting and downvoting is.
nice
correct answer by here
Thanks Atari2600Fan
Good to know!