Usage and credit

Agree on where the work can go and who gets named, before anything is posted.

Where can the photos go?

Write down the channels, how long, which edits are OK and who approves. "Social" can mean a free post or a paid ad, and those are different deals.

New channel, longer use or paid ads later? Talk again and update the agreement.

Name everyone who made it

Photographer, model, makeup, hair, styling, studio: ask each person how they want to be credited. Credit says who made the work; it doesn't transfer ownership.