Subscription based models, like Kindle Unlimited, give readers access to eBooks without purchasing an eBook outright. The Pages Read column shows the number of standardized digital pages read from your eBook by users within these subscription models. Standard retail purchases will not have a value in this field. To learn more about how Amazon pays royalties based on pages read, please read Amazon's page about their royalty system: Kindle Edition Normalized Pages Read.
Please note the Pages Read column will only show entries posted April 2022 or later. Earlier reports will show these values under Quantity column. All non-Amazon partners will continue to post values under the quantity column.