An MOT test is an annual inspection that is required by law on all vehicles in the UK that are older than 3 years. The test follows strict criteria that is set out by the DVSA to determine whether your car is fit for purpose and roadworthy.
During the MOT test, a technician will assess your vehicle, will conduct a comprehensive inspection to ensure the vehicle is in roadworthy condition. However, it is not the same as having your vehicle serviced and the MOT test does not check the general mechanical condition of the vehicle.
If the vehicle passes, the tester will provide you with a pass certificate. They will also separately list and inform you of any 'advisory' or 'minor' items that will require attention in the near future so you can keep an eye on them.