Amazon Integration Documentation
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Amazon Integration is a Store Manager addon that allows exporting products from your online store to Amazon, synchronizing inventory, and importing orders from Amazon to your online store.
Note that Amazon Integration is a Store Manager addon, which means it is a part of Store Manager and can't be used separately. In order to use Amazon Integration addon, you first need to install and register Store Manager for Magento, PrestaShop, or WooCommerce.
After that, you should register the addon with a separate license key, and then you can start using it.