Amazon Integration Documentation
Install WP Product Review Pro Plugin
After you have purchased WP Product Review Pro plugin, go to Purchase History to download the plugin. After downloading the plugin, navigate to Appearance > Plugins> Add New > Upload, in your WordPress dashboard. Now, click the Choose File button, select the archive of your theme from your local computer and press the Install Now button. In a few seconds, WordPress will upload and extract the theme archive for you. All you need to do next is to press the Activate link under the message for successful plugin installation.
Configure Amazon Integration
Next step is to add your Amazon Affiliate details in the plugin. From your WordPress dashboard go to Product Review -> Amazon Settings. All boxes are required.
You can find more details about where to find your Access Key ID and Secret Access Key here: https://affiliate-program.amazon.com/gp/advertising/api/detail/your-account.html
Check out what the Associate Tag is and how to get the value: http://docs.aws.amazon.com/AWSECommerceService/latest/DG/AssociateTag.html
Add the Amazon product
The last step is to add your product from Amazon using the Amazon Product ID that you can find on each product link after dp/ as in our example B0177V0H7K from this link: https://www.amazon.com/dp/B0177V0H7K/ref=strm_fn_nad_1_1