Votes on QUESTIONS tells the users which questions that are great and useful.
Votes on QUESTIONS quantifies the interest of getting an answer to a question.
Sort your search on votes to find the most voted, useful and great questions.
Votes on ANSWERS tells the users which answers that are great and useful. The answers with the most votes inside a question will rise to the top.
Votes increases the reputation of the user who asked the question, or answered it.
Thank the user by voting!