Vorticity is all about spinning. Imagine holding a big toy top and spinning it really fast on the ground. The top is spinning in one direction, and that spinning motion is called vorticity.
Now imagine a toy car driving through the air. As the car moves, the air around it starts to spin a little bit. That spinning of the air is also called vorticity.
In science, we use vorticity to describe how much an object (like a toy car or a spinning top) is spinning and which direction it's spinning in. Scientists use vorticity to study things like weather patterns in the atmosphere and ocean currents in the sea.
Advanced scientists use fancy math formulas to measure vorticity accurately, but for now just remember that vorticity is all about spinning things!