Every time you give a " on someone's comment, you give them a kudos. So on your post, hit the heart on posts that you appreciate and they all get kudos.
Peoplea can also give you kudos as well as those how have answered.
Giving kudos is free and also is a sign that people appreciate your involvement. It also helps them achieve points to their next level.
When you post a question you can choose the answer you feel helped the most. Then that user will get a bonus 50 points for having the most appreciated response. But sometimes it is tough since there are multiple contributors.