ASIN is the acronym for Amazon Standard Identification Number. It is utilized by Amazon to identify items that are available for purchase. This makes the number unique for each product. It is composed of numbers, letters, or a combination of both. The number is available on the product's Page on the Amazon online store. For books, you can find the ASIN number is identical to the ISBN. Other numbers are created when they are added to Amazon's catalog items. To find a specific variant of an item, the ASIN can be used to search for it in Amazon's search feature.