> For the complete documentation index, see [llms.txt](https://docs.shoplift.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.shoplift.ai/api-reference/public-api/update-custom-audience.md).

# Update custom audience

Renames a custom audience and/or replaces its rules. Omit a field to leave it unchanged; `rules`, when sent, is the audience's complete new rule list: it is never merged, so any stored rule you leave out is removed. It is validated exactly like POST /custom-audiences, and an invalid rule rejects the whole request. Launched tests keep the rules they launched with; drafts use the new rules when they launch. A duplicate name returns 400.

```json
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```