Every certificated pilot is required to complete a flight review every 24 calendar months to keep acting as pilot in command. A lot of people still call it the BFR, for biennial flight review, though the FAA just calls it a flight review now. If you have not done one in the last 24 months, you are not legal to fly as PIC until you do, and there is no checkride and no pass or fail, it is a review, not a test.
A flight review is a minimum of one hour of ground and one hour of flight with an instructor. On the ground, we go over the current general operating and flight rules, the regulations that actually matter for the flying you do. In the air, we review the maneuvers and procedures that make you a safe, capable pilot in command. The goal is not to trip you up, it is to make sure you are sharp and to fill in any gaps that have crept in since your last review. When we are done and you have shown you are safe, I sign your logbook and you are good for another 24 months.
Here is the part worth knowing, a flight review is what you make of it. Come in with the systems you have always wondered about, the airspace that always confused you, or the maneuver you never quite nailed, and we will work on exactly that. It is the best cheap insurance in aviation.