HOT RIDES

I know very little about cars. So, you know I know less about a turbocharger for cars. I know a lot of people who like to add things to their cars. Like “pimping their ride”….I’m old, I think that’s what it’s called. Anyway, does anyone know what a turbocharger does? Is it just for, like, racecars? I looked online, and it seemed as if you can put it on any car, but why?