Its money you get if you can't work due to a condition or disability or whatever. I am not sure what state you're in but it varies how to apply for it and what the qualifications are. So your best best would just be to look it up on google, as I cannot offer a very good description of it.

Basically you apply and give the Social Security office medical records and permission to look into them so they can determine whether your condition prevents you from working or not and can get income. Its possible to be denied especially first time you apply but there is the option of appealing it. But yeah that's the best I can explain it.