What is a CO2 laser procedure? what areas does it target and how long does it last?

I have good skin for a 61 year old woman, really no lines, other than the "smile" lines which I hate and could be helped with Relastyn. But what I hate more is the softening of the jaw line. I have been told I could get a "mini lift, but these procedures are not cheap. And, I too am afraid. I have a client who had some work done in Costa Rico, and though I am not sure of what she had done, she had to sleep sitting up. Yikes.