I currently have it set up only for leads. The person would fill out a brief form from my Meta ad (first and last name, email, phone number) and the info gets zapped into Jobber as a client. I don't think a message would work as it wouldn't have any contact info on the clients profile.
Technically I actually zap the lead into a google sheet which then is zapped into jobber as a lead. I like doing it this way as it helps to automate inputting clients into my "Lead Tracker". You can also run a bunch of other automations from the google sheet like a welcome email, text message, etc.