# When should I up / down vote

This question is at a stack exchange meta level The alt text for up voting a question is this question shows research effort; it is useful and clear. Should the question be useful to me or if i think it would be useful to other people?

Answers are even more confusing, I am suppose to vote depending only on whether the question is 'useful' or not. Without taking into account if it's correct or not, is it clear etc.