I'm with English Language & Usage forum almost three months, but still not clear about the difference between 'Up-vote' and 'Accepted' answer. What does come up when I click Check (Accepted) mark vis-a-vis Up vote mark?
It means this:
I, as the question owner, found this particular answer most helpful for my needs.
It is not required. We view it as more of a social convention than anything else.
Note that it also has a few effects:
- gives answerer +15 rep, gives you +2 rep
- "docks" the answer to the top of the answer list regardless of sort order