> For the complete documentation index, see [llms.txt](https://helpcenter.channable.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://helpcenter.channable.com/manage-improve-product-data/rules-bulk-edit-and-enrich/how-to-use-actions-then-in-rules/rule-action-copy-value.md).
# Rule action: Copy value
* Copy the content from one field to another
* Fill empty description fields with content from title
* Fill empty sale\_price fields with content from price
Use the **copy value** action to copy the value of a certain field to another field. You can select which field to copy the value from.
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