Data Transmission Control: The Google Ads Setting That Decides What You Send
Google Ads quietly introduced Data Transmission Control in January 2026 — a setting on top of Consent Mode that determines what your WooCommerce store sends to Google when a visitor denies ad_storage consent. Three modes exist: transmit limited data with redacted identifiers, block all advertising data until consent is granted, or leave the default unchanged. Most store owners have never configured it. With 40–50% of EU visitors rejecting cookies on compliant banners, the wrong setting silently erases a third or more of your conversion signal from Smart Bidding.