A vote is what someone gives to you when they like your answer, you can see how many votes you've gotten for an answer by looking at the number next to the green thumb by your answer. To look at all the votes you've received over all go to your profile and it will be the number next to the thumb. To upload a picture, go to your profile, and click "change" under your current profile picture. Hope I helped! (Votes would be appreciatted, click the green thumb ;)
Votes, also known as "The Green" are a way to show your appreciation for the person taking time to amswer the question. But you don't have to only give thumbs to people that answer your questions, you can give thumbs or green or the green or a vote to anyone you feel has a good answer :)
well, if someone likes your answer, he/she might want to give you a "vote" as a token of appreciation for a good answer. so, try to help as many people as you can with your answers and people will follow you for that.