When I’m trying to decide what to promote I always ask myself the following questions: Do I use this product? Will the vast majority of my readers benefit from using this product? Is the buying process easy? Is there a good affiliate commission rate? (Not always necessary)
Competitor Analysis: Analyze your competitors, their content strategy, and their primary traffic sources. What methods are they using to build their audience? What type of content they're producing and where are they promoting it?

These rewards usually come by way of referral incentives, such as product or service discounts or free access to an app or program that would otherwise cost money. While there are upfront costs to companies initiating a referral program in order to cover the cost of the reward, it can greatly increase long-term revenue by making loyal customers from an existing customer base and by bringing in new customers (who, in turn, may refer friends as well).
To get find these websites, we are going to use Ahrefs which is a tool that lets us analyze websites and gives us a whole bunch of useful stats like, how much traffic a site gets, who links to them and how much money they earn per month.