I think they're probably referring to this service https://atozdocuments.com/services/live-scan-fbi-fingerprinting/. If so, that's most likely what they mean. There's nothing complicated about it, even though it might seem like a very serious process from the outside. In reality, just contact the company I linked to, schedule an appointment at a time that works for you, go there, and in just a couple of minutes you’ll get confirmation that your data has been submitted to the government database.