I'm almost done onboarding this one client. He owns a martial arts studio. I sent him a google drive where he can upload all of his photos videos, testimonies, etc. 1. How do I know if the creatives he uploaded are objectively good? 2. How many creatives should he upload before we get started with advertising? 3. He uploaded 6 photos to the google drive, is that enough? Or should I ask him to add more?