The reason why a magnet has magnetic force is because its molecules have microscopic magnetism inside. Specifically, each atom in a magnet contains unpaired electrons, which carry a magnetic moment of their own, equivalent to a tiny magnetic field. Under normal circumstances, the magnetic moments of these electrons are oriented in different directions, so there will be no macroscopic magnetic field effects.

However, in some cases, such as under the influence of a magnetic field, the magnetic moments of these electrons will interact with each other, resulting in their magnetic moments facing the same direction. When a magnet is exposed to an external magnetic field, the magnetic moments of these electrons interact with each other, causing the magnetic moments of the electrons in the entire magnet to face uniformly, resulting in a macroscopic magnetic field effect.

The microscopic effect of electron magnetic moment in this magnet ultimately leads to the macroscopic magnetism of the magnet. Specifically, when two magnets approach, their magnetic fields interact with each other, creating an attractive or repulsive force between the magnets, resulting in magnetic force.

For example, when a magnet approaches an iron nail, the electrons in the nail are subjected to a magnetic field, causing their magnetic moments to face in the direction of the magnet. When the electron magnetic moment in the iron nail interacts with the electron magnetic moment in the magnet, a magnetic field effect is generated, causing the iron nail to be adsorbed on the magnet. This is a specific example of a magnet generating magnetic force.

It should be noted that not all materials can generate magnetism like magnets. Only materials with unpaired electrons can generate magnetism, such as metal materials such as iron, nickel, cobalt, etc. In addition, there are differences in the magnetic strength and stability of different materials, which need to be judged and analyzed based on specific material properties.