The week of December 1, 2026, the campaign-level Display switch (target_content_network) can no longer be set to false. Doing so in the Google Ads API returns an OPERATION_NOT_PERMITTED_FOR_CONTEXT error. Serving behavior for new campaigns stays the same, because ad group channel controls keep Display off by default.
Existing campaigns with Display off get converted automatically. ALL_CHANNELS ad groups become ALL_OWNED_AND_OPERATED_CHANNELS. Ad groups that only targeted Display get paused.
For agencies: check any scripts or integrations that create Demand Gen campaigns. They need to set channel_controls.selected_channels.display on the ad group instead.
Via Google Ads Developer Blog.
