A SKU is your internal tracking code for a product—your own way of labeling inventory so you don’t lose your mind when you have multiple sizes, colors, bundles, or sales channels. Unlike an ASIN (which is Amazon’s identifier), a SKU is created by you (or generated by Amazon if you let it).
The big benefit is control: a good SKU naming system helps you instantly understand what’s selling, what needs restocking, and what’s eating up storage. For example, a SKU like “MUG-12OZ-BLK-2PK” tells you more in two seconds than a random code ever will.
When returns, reimbursements, or inventory mistakes happen (and they do), SKUs make it much easier to trace what went wrong.
- SKUs are seller-defined; ASINs are Amazon-defined.
- Keep SKUs consistent across variants and bundles.
- Clear SKUs speed up auditing, restocks, and troubleshooting.
- Avoid special characters that break imports or reports.
