How does Ionized hair dryers help your hair?

I mean isn't ionized just charged molecules so how does this help your hair?How does Ionized hair dryers help your hair?
it helps your hair because it takes a lot of the frizz out by preserving moisture :)How does Ionized hair dryers help your hair?
An Ionic blow dryer uses Ions, which help protect your hair and avoid frizzies and fly-aways. I have ConAir's Ceramic Ionic blow dryer (around $15 from Wal-Mart). It helps my hair be really smooth and shiny.