To make things simple: When you sell service or product, it is called affiliate marketing. You do not need to invest, research and build something. You just need to sell something that someone already builted. It is not hard believe me.
To make things even simpler: When you sell product and service and get commission from that transaction that is called affiliate marketing. There is so much products and services those days, but we will stick to most profitable and most growing market for past 20 years online and that is off course adult affiliate marketing.
Keep reading for simple steps to get idea how affiliate world works, we are focused on adult services and products, but principle is less or more same for any other services or products in any other field, people have some needs, people need something to buy - you should be the one who will offer them best-valued product and services, that is the whole idea :)