Welcome to the forum! HITs - Human Intelligence Tasks - they are individual tasks that you work on and get paid.
Register and verify your account and then go to mturk.com and look at the available tasks in the HIT tab ( https://www.mturk.com/mturk/findhits?match=false ). You won't qualify for a lot of things because you're new but there's stuff out there. Check out the daily threads located in this part of the forum, and then post there for more help. That's where all the people here post http://mturkforum.com/forumdisplay.php?30-Great-HITs