Besides gaining a reputation with your questions and answers, you receive badges for being especially helpful. Badges appear on your profile page, questions & answers.
For referring a new user.
For Signing up.
For referring a new user for paid membership.
For adding your social media links to your profile.
For adding a new question.
For adding an answer.
When your answer has been chosen as the best answer.
Your question gets a vote.
Your answer gets a vote.
Each time when a user follows you.