As well as the standard "this question is useful and clear" and "this answer is useful" meanings, up-votes on the meta sites can also mean:

• I agree with this suggestion/proposed solution

• I have reproduced the bug

• I like the freehand circles on your screen shot

This tag is for questions which are specific to upvotes. For questions about the voting mechanics in general, use the voting tag. For questions about downvotes, use the down-votes tag.

_{Copied from: http://meta.stackexchange.com/tags/up-votes/info}