You can search on multiple places:
- One way is to check the reports and find Popular Channels and Affiliate IDs. For example, if your niche is Weight Loss, you can check Popular Channels in the Weight Loss niche, and check their ads, landing pages, etc. (or the top affiliates and do the same )
- Another way is to go to the Search Ads screen, select your niche, and sort by Estimated Ad Spend. That way you get the ads that have spent the most money (meaning, they are successful). You can then check the ad, find the affiliate id (if it’s an affiliate product), check other ads in the same channel, etc.