What exactly is a salon blowout?

Hi everyone,

I’m a LifeBooker/Groupon/LivingSocial etc. subscriber and I’m always seeing them run specials for blowouts at salons in my city. This week it’s running for $24 down from $55 and I’m wondering what’s so special about having someone blow dry your hair that you would pay for it? Do they do something special to it that makes it last longer or is it a special occasion kind of thing? Hmm…