Before you start creating your creatives, make sure that you have updated your brand guidelines in the Instructions section of Settings Page.
Go to the "Creatives" section to generate AI creatives.
There are 3 ways to generate creatives on the platform. Each way would generate 4 iterations based on the input.
1) Write a prompt
2) Attach an image along with a prompt
This would allow you to create the image specific to your brand and needs. You can give additional instructions in the prompt to tweak the creatives based on your need.
3) Recreate Competitor's Ads
Click on the "Recreate" button to generate an ad in the Creative section.