I am confused on how this works?

i get asking and answering questions but how do you rate answers whether they are good or not? can you open your question back up once it is closed? what is the show stars?I am confused on how this works?
Get 250 pts. and you'll be on level 2. Then you can ';rate'; answers with ';thumbs up'; and ';thumbs down.';





Answer a question and get 2 pts. Ask a question and lose 5. Choose the ';best answer'; to your question and get 3 of those 5 back.





Be chosen as ';best answer'; and get 10 pts. plus 1 bonus pt. for each ';thumbs up'; your answer received.





Vote for ';best answer'; on unresolved questions where the asker was too lazy to choose ';best answer'; and you get 1 pt. per question. You also get 1 pt. every day for just logging in. It鈥檚 as easy as that!





Sorry, you cannot every ';reopen'; a question once it's closed and the stars are supposed to be given to particularly good questions but brown-nosers given them whenever they answer a question in the hopes the asker will choose them as ';best answer.';I am confused on how this works?
Give someone a thumb as you go along. You have votes as well. The vote tab is is in the toolbar scroll arrow.
You can rate answers once you get to level 2, and NO you can NOT re-open your question. Stars mean someone likes your question.