You don’t want to recommend products you haven’t tried yourself. After all, you want to help others with your experience with those products, so you need to be absolutely sure that they are useful to your audience.
They pay you and then they don’t have to worry about marketing because you’re doing their marketing for them. So you are part of their affiliate marketing army. That’s the corporate side of how to start affiliate marketing.

For example, if you’re a beginner or just starting out, you might want to think about which market to focus on, the products you want to promote, how you go about promoting them.
In affiliate marketing business, marketing plays a vital role. Marketing may not necessarily involve spending extra bucks. You can leverage on your existing resources. You can market your product by adding affiliate links into your content. However, the product you are marketing should be relevant to your content.