i see alot of people writing the word infopass what is it how do u do it and what do u get out of it?

http://www.immihelp.com/immigration/infopass.html

It's an appointment that you will do in your local USCIS office to check advances in your case. Of if you think that there is some trouble with your application or procesing times yoo can do an infopass appointment to ask them directly what's happening...