"Pro bono" is a Latin term that refers to lawyers who are willing to provide assistance for free. Bar associations like to talk about the fact that lawyers do 'pro bono' but, in fact, very few actually do, and the need for legal services is far greater than the amount of pro bono help available. Nevertheless, some court websites will direct you to pro bono services instead of simply providing the information you need.
Pro bono services can be uneven. Some can be excellent while others may be done by lawyers with little expertise in bankruptcy law. If you read a good book on how to file for bankruptcy before you meet with your pro bono lawyer, you will be better able to gauge their knowledge of bankruptcy law.