The magnetic field of a magnet is strongest at its poles. These are the two ends of the magnet, typically referred to as the north pole and the south pole. The magnetic field lines are densest at these points, indicating a stronger magnetic force.
When you bring another magnet or a magnetic material close to these poles, you will notice a stronger attraction or repulsion compared to the middle part of the magnet. This is because the magnetic field is concentrated at the poles, making them the most powerful areas of the magnet.
In summary, the magnetic field is strongest at the poles of a magnet, where the magnetic force is most intense.