Not every affiliate niche will work great for you. Furthermore, the categories vary in the degree to which they’re profitable. Both facts mean that you’ll need to put in some research before settling for an option.
An excellent way to select the best niche for your affiliate website is by considering your hobbies and topics that interest you. This would allow you to develop compelling content for the products and promote them with better enthusiasm.
Another suggestion is to pick a niche that is not well-known, as it means less competition and a better chance to rise through the rankings. Finally, remember to settle for a category with enough traffic to make it worth the effort.
For instance, niches whose keywords show up about 5000-7000 times in searches per month are more suitable for getting the best results. Furthermore, it would help if you chose a category that has a broader scope. This gives you the advantage of more topics from which you can develop content.