How do i let people post comments on my wall on facebook?

Ok I asked this question already but every one said to go to my privacy settings and look for a way to unlock my wall because I locked my wall so no one could put comments on it but I want to make it so people can go on my wall and put things up but I forgot how to do that I go to my privacy settings then what help please give me details when u tell me how don't just say go to privacy settings or go to settings and dabble with it im reallyad right now so please help