Using ASIN to Identify an Amazon Product
The Amazon Standard Identification Number (ASIN) is a 10–digit alphanumeric identifier that is assigned by Amazon to a product upon initial creation in their marketplace. NetSuite Connector uses a product's ASIN to match with an existing listing on Amazon.
Since the ASIN is Amazon's product identifier, if NetSuite Connector sends Amazon the ASIN when syncing products, usually, Amazon will not reject listings if they contain product data that is inconsistent with the data already on the item. Instead, Amazon will simply ignore the data discrepancy on most fields and accept the listing. There are a few fields that Amazon will reject for data that conflicts with its own, and of course, your seller listing specific data (price, condition, quantity, or others) does not need to match the existing data on Amazon. For this reason, you should add ASINs to your items in NetSuite.
The product ASIN is indicated in the URL for your product, it is the series of numbers immediately after the product's name and "dp". It is also indicated in the product information section at the bottom of your product's listing.
There are online software tools that can lookup the ASIN assigned to a product. Typically, they let you to import your product identifiers (UPC, ISBN, and others) and then identify the ASIN assigned to that identifier. This can help you save time if you have many items in NetSuite with fields where the ASIN should be entered.