The functions of wind are roughly as follows:
1. Wind causes air flow to bring precipitation and snowfall.
2. Large-scale air flow causes ocean current movement to balance the heat distribution of seawater.
3. Adjust the temperature difference in the atmosphere and spread the rising hot air currents from the equatorial region to the poles.
4. Pollination and reproduction of wind-pollinated plants.
5. Wind energy generation.
6. Air purification and diffusion of polluted air.
The above is just my personal opinion. For reference!