You can give +K to your friends as a way of recognizing their influence. Perhaps you read a great article on marathon training that a friend posted, you can give your friend a +K about running as a way of recognizing them for providing great content and positively influencing you. Simply visit another user’s profile and click the +K button next to a topic to recognize them. Your friends can give you +K in topics as well.
Users receive 10 +K daily to use. The maximum +K earned is 10 and users can never exceed 10 +K. You can view your +K on the bottom left hand corner of your profile.