What does selecting a Most Valuable Player in a Warzone do?
Solution 1:
Each vote gives the player an extra warzone commendation.
Each vote also provides you with 50 extra valor points.
Votes are given by players to other players based on their performance (or whoever they feel like).
To address Mufasa's comment/question:
You can only vote for your own team.
You cannot vote for yourself.
Again, you can only vote for your own team.
Sometimes the UI bugs out at the moment and you won't see the little shield icon to vote, just hit CTRL + U two times and it will reload your UI and let you vote.