http://or-in.facebookwkhpilnemxj7asaniu7vnjjbiltxjqhye3mhbshg7kx5tfyd.onion/business/help/170372403538781
Original Example 1 Example 2 For example, the ad system may fill the background with matching colors or patterns of your ad's images. 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.