Try to write answers with at least 3 lines. Your English should be easily readable. Don't stop, answer a lot, but don't answer nonsense because the moderators do read what you say. Answers get more money than questions, but questions are essential, so make sure to answer more but don't stop asking questions or you'll contribute to a dead community.
Try to write more than one paragraph but keep the text short so that it's easily readable by those who come (and the moderators by extension). Make an effort and stay consistent!