There are a lot of tools, like Helium 10, Jungle Scout, etc., that are mostly used by the sellers, and they give you correct data. But I will tell you that if you want to see the most relevant keywords for your products, you can use the “Brand Analytics” tab, which is free at that time and will give you the rank of keywords on which you can better convert sales. It is really helpful because it collects data from the Amazon marketplace and will help rank your products.
