Question

What determines your badge level in a given subject?

Answer 1

Karma!

Explanation:

Level badges are awarded based on the total amount of karma you have accumulated in a specific subject.

You earn karma by writing answers or by editing answers written by someone else. Each answer will get you `+50` karma points and each first edit on another person's answer will get you `+20` karma points.

After that, any "like" that the answer gets will be awarded `100` karma points, which will be distributed among the people who contributed to the answer according to their contribution.

You can read a more detailed explanation on how karma, badges, and levels work here

https://socratic.org/karma