Choosing the right niche is also key when trying out affiliate marketing. There are lots of niches out there for you to try but some are more profitable than others. These profitable niches can also grow or lose profitability over time as trends rise and fall so it’s always good to keep this fact in mind.  Some affiliate marketing niches that still remain popular after many years include technology (things like apps or gadgets), health and fitness, fashion and beauty, lifestyle, and pet care. These are still fairly broad and you could focus on particular niches within these groups. For example, skincare is a trendy niche in health and fitness that you could cater towards.