http://or-in.facebookwkhpilnemxj7asaniu7vnjjbiltxjqhye3mhbshg7kx5tfyd.onion/business/help/170372403538781
This slight change will only be applied if it's likely to improve performance for certain placements. These changes are minor, and you won't be able to preview the change. Dynamic creative is useful when you’re unsure which media or ad components resonate with different audiences. Because results are shown as the aggregate performance across all variations, using dynamic creative as a substitute for split testing is not recommended.