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> Use this file to discover available pages before exploring further.
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# SKU Field

|| Available on: ✔️ Add ✔️ Update ✔️ Export

![](https://storage.crisp.chat/users/helpdesk/website/b219050a5836c000/sku_j75uwc.png)

||| To learn how to add extra text to the beginning or end of the SKU field, click [here](https://help.stock-sync.com/en/article/custom-text-formatting-in-description-vendor-title-sku-fields-1m4fjwl/).

If your feed file does not include an SKU column, you can add or update SKUs for your products. This field also supports custom text.

| For example, If you want to add text to the beginning of your SKU that is not in your feed file, you can do by simply adding **XYZ{{SKU}}**. ![](https://storage.crisp.chat/users/helpdesk/website/b219050a5836c000/sku-1_8a6jlp.png)esult: XYZ168 | XYZ163 | XYZ162

Additional Notes:
* Ensure SKUs in your CSV do not include leading characters such as apostrophes (e.g. '1234). These may cause matching issues.
* If your store uses a prefix in SKU (e.g. store SKU is DS-123 while CSV SKU is 123), make sure the prefix is configured in the SKU field settings so Stock Sync can correctly match the SKUs.
* When SKU is used as the Unique Product Identifier in Step 2, Stock Sync will **match only** using the SKU and will **not overwrite or change** the SKU during updates.
* To overwrite incorrect SKUs, temporarily switch to another unique identifier (such as Barcode or Product Title) and map the correct SKU field before running the update.