This document provides guidance on how to conduct product research to find a profitable product to sell on Amazon. It recommends analyzing criteria such as keyword search volume, ensuring the product is not patented or hazardous, and that it is eligible for advertising. Additional criteria include an average price of $25 or more, average sales of 300 units or more, average revenue of $7,000 or more per seller, and an average review count of 500 or fewer. The document examines tactical backpacks as a sample product and finds it meets the criteria. It also provides tips on areas of a product that could be improved based on customer reviews.