Decide what you actually want the ad to feel like
This is the part I would not hand over to AI. Before writing a prompt, decide what kind of world the product belongs in for this particular campaign. A skincare product photographed against a clean studio background tells a very different story from the same product sitting beside a bathroom sink in soft morning light.
Think about the customer who will see the ad and what you want them to notice first. Perhaps the product needs to feel premium and considered. Maybe it should feel practical and familiar. The clearer the direction is before opening an AI tool, the less time you will spend generating images that look impressive but have very little to do with the brand.

