In case of e-commerce websites, scraping of data occurs rampantly, for price wars, seasonal discounts, sales, item attributes, and more. With thousands of products, ranging across hundreds of categories, you do not want to end up with incorrect data because you extracted information about one product on your website, from another similarly named product on another website.
This is where the manufacturer part number comes in. The manufacturer part number is a unique pin number given by the manufacturer, that is assigned to every item that their brand makes- every product, accessory and variant will have a different manufacturer part number, and you can actually find a catalog of just individual products, and their unique part number. In fact, suppose you have the same item, available in two colors, both of them will have a different part number. So, the part number is a unique way to identify an exact product match, extract its information, as well as its price.
Incorrect data or dirty data is the bane of all businesses and if you are collecting product information or prices without using a unique identifier then there is a huge chance of things going wrong in scenarios like-
Trying to match the price of a product with a different variant of the same product.
Gathering information of a different product under another product, resulting in customer woes and dissatisfaction.
Serious business implications which might even result in a lawsuit, due to displaying wrong information on your website.
So, when you have a unique identifier like manufacturer part number, you need to assign it to your product database and use it to gather information.