@catherinelux yay! hehe, love it xD
Voting is like supporting the book and author. Most people do this system: "Ok guys, 50 votes till next chapter. 100 votes till next chapter" etc... The more votes, the more popular it gets and you get more reads etc..
Reading list is: you see a book. You read the description and you like it, so you put it in your reading list meaning you're going to read it. You can put it in your library too. that helps when you have iphone/pod/pad, you can read your books there. But anyways, people can see your reading list etc..
Does it make sense? I'm sort of bad at explaining :P
You can join clubs and stuff too.
http://www.wattpad.com/club/42-the-cafe
this is the cafe where you meet people, talk about random stuffs etc.. like a socializing place. There are other clubs too :)