How do you use a diffuser?

My hair dryer bit the dust today, so I bought a new one and it came with a diffuser. How the heck do you use one of those things and what for?

I think it’s mostly for people with curly hair so the dryer doesn’t make it go all frizzy.

When I permed my hair (eek!) I just kinda held it in one spot and scrunched my hair a bit. :dunno:

Oh…well haha. My hair is more wavy than curly.

You could probably still use it. Use mousse and then scrunch a little bit. I think they’re frustrating, because they don’t seem to dry as fast.