What does Daniel 7:10 mean?

A river of fire flowed out from in front of him. Thousands upon thousands served him, and millions stood in his presence. The court was called to order, and the books were opened. Daniel 7:10 - Modern Text Bible

(This is a picture of ultimate authority and judgment. God is surrounded by countless attendants, and now he’s about to judge everything that’s happened, with the records open for all to see.)