Build a Meta dynamic creative ad with multiple asset variations

Steps

1. Create an ad creative with the dynamic_creative flag set to true; in the asset_feed_spec, provide multiple images or videos, headlines, bodies, descriptions, and call-to-action objects as separate asset arrays.
2. Each asset type (image, headline, body) can contain multiple variants; Meta's system will automatically test combinations and serve the highest-performing variant to each viewer.
3. Reference the creative in an ad object where the ad set's optimization_goal and billing_event are compatible with dynamic creative; dynamic creative works with most objectives but verify compatibility for your specific objective before building.
4. Set the creative's degrees_of_freedom_spec to specify which asset types are allowed to be varied; this prevents Meta from mixing assets in unintended combinations.
5. After the ad goes live, query the ad's creative asset combinations performance via the Insights API using the asset_feed_card_id breakdown to see which specific combinations are driving results.
6. Regularly refresh creative assets (add new variants, retire underperformers) using the creative update endpoint; dynamic creative fatigue can set in as the algorithm converges on a narrow set of winners.