what to sell on amazon fba 2021 involves researching the most profitable products and niches for your business. In 2021, trending categories included health and wellness, home improvement, and personal protective equipment (PPE). Sellers need to look for products that have low competition but high demand. Tools like Amazon’s Best Sellers list and product research software can help identify these profitable opportunities. By focusing on trending products and optimizing listings with the right keywords, sellers can boost their chances of success on Amazon FBA.