The Action Bar is a handy tool on every Creative profile that allows you to take some kind of action towards them. You can find the Action Bar right below the Creative's Background Image, to the right side.
You can take several actions towards a Creative:
Follow - will add them to your Dashboard for reviewing later.
Vouch - if you mutually follow one another, you can give them a Vouch.
Favorite - receive an email update when they change their availability status.
Note - make a note on why you're interested. The Creative will not see your notes, but you may share with your colleagues via the Team feature.
The Action Bar will also follow you as you scroll up and down the page: