If a random trip happens reset the breaker by turning it fully off, then back on again. You will often see some led flashing which is just the breaker going thru a self test procedure.
If the breaker persistently trips. Think of anything you may have introduced that could cause the trip. Something as minor as a new light bulb can cause the trip. Maybe you added a new light, paddle fan, or plugged in a new computer. Undo anything you’ve added to the circuit and attempt the reset, if it holds then you know its most likely an issue with that thing removed from the circuit. Try to plug that thing into a different circuit and see if trips that circuit also. If the thing trips multiple circuits then it most likely should be replaced. If there is nothing new introduced and the breaker is still tripping, leave the breaker off and contact a professional.