A preflight checklist is a list of tasks that should be completed before each flight. The tasks on the checklist can vary depending on the type of aircraft, but they typically include tasks like checking the fuel levels, verifying that all the control surfaces are functioning properly, and inspecting the engine.

For a Cessna 172, the preflight checklist is particularly important because it helps to ensure that the aircraft is safe to fly. The checklist can help to identify potential problems that could lead to an accident, and it can also help pilots to remember all of the tasks that need to be completed before taking off.