Density altitude by definition is pressure altitude corrected for non-standard temperature. Well what does that mean? Density altitude is better described as where you airplane feels like it's at. No not where location wise but where altitude wise does it feel like it's at?
If the surface density altitude at your airport is 3000 feet your airplane feels like it's at 3000 simply sitting on the ground. This is huge if you're flying a tiny piston airplane like my Cessna 150!
This really puts a cap on our performance for that day.
Think about out west where it really gets hot and the density altitude gets really high! I'm talking altitudes that may even ground you that day because your airplane may not even leave the ground.
Density altitude is just one of five different types of altitude curious about the other 4? Check out this video.