Edit a Google campaign's device, location, or language targeting

Google Ads compliance row M.10: geo and language targeting set at creation must stay editable afterwards. Send at least one of devices, locations, languages; each provided field REPLACES that field's existing criteria on the campaign (a full set, not a delta). Fields left out of the body are untouched. Google only; every other platform returns 501.

devices is the full set of device bid modifiers: a supported device you leave out is switched off with a bid modifier of 0, since Google cannot remove a device criterion. A device the campaign's channel does not carry, and a set that switches every device off, both return 422.

locations accepts the same shapes as campaign creation: a bare array of ISO country codes, or an object with countries/regions/cities/zips/metros key lists (key from GET /v1/ads/targeting/search?dimension=geo). Negative (excluded) locations are left untouched by this endpoint. An empty location list returns 400 instead of removing every criterion: a Google campaign with no location criteria targets every country, so omit locations to leave targeting alone.

The removes and the creates go out in ONE Google googleAds:mutate, so a failed edit leaves the campaign's previous set intact rather than a half-applied one.

languages is an array of Google's language codes (ISO 639-1, plus variants such as zh_CN); an unknown code returns 400.

The response includes the refreshed devices/locations/languages state read back from Google after the edit, and invalidates the cached copy GET on this campaign would otherwise keep serving.