What is a key recommendation for the number of ads to include per ad group to allow the Reddit system to optimize effectively?

Reddit's ad platform, like many others, uses machine learning to optimize ad delivery. Providing 5-7 ads per ad group gives the system enough variety to test different creatives, headlines, and calls to action with your target audience. This allows the algorithm to learn which combinations perform best, leading to more efficient spend and improved results. Fewer ads (1-4) limit the system's ability to learn and optimize, potentially leaving performance on the table. More ads (20+) can dilute the learning process and make it harder for the system to identify clear winners efficiently.