You Put your hands our in the direction of a creature, you send a ray of wind against the creature and it take 1d10 wind damage and gets the creature knocked prone. This spell only affects a creature if it is a creature of "Normal" size or smaller. 

You can also use this spell to push an object, but you still need to roll damage because the object can break.

This spell gets and extra 1d10 If you use it at an spell slot of level 3 or higher