Amazon US, UK, DE bestseller category frequency

A bestseller is a product that ranks in at least one category in the top 100 selling. 75% of the bestsellers appear only in one category in the top 100. Some make it into more than one category's top 100. A small number of products make it into dozens of categories as bestsellers. The most frequent product made it into the top 100 of 84 categories. (Based on data collect in May 2022)
This page is a bitesize highlight. Read more about this in-depth: Amazon bestsellers are big data
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