A lot of magnets are used in a car. They are used in electromobiles, which are harmless to the earth. Certain parts of personal computers use magnets.
Magnets are useful also in hospitals.
The repulsion can levitate a man. A strong magnet can aid in downsizing computers and improving their functions. You can talk and hear on a cellular phone, and know you are being called by feeling the vibration. It was developed as the world's most powerful magnet. It has various features.