To preserve conversion tracking after regulatory changes such as the Digital Markets Act, a marketer who advertises in many markets around the world, including Germany and France, and runs YouTube and Search campaigns with Google while measuring online conversions, should implement the Google tag sitewide to unlock privacy solutions like Enhanced conversions, consent mode, and the Attribution Reporting API.

• Remove the Google tag from all landing pages and evaluate campaigns based on clicks only to remove third-party cookie reliance completely.
• Implement the Google tag sitewide, unlocking privacy solutions like Enhanced conversions, consent mode, and the Attribution Reporting API.
• Remove the Google tag and send conversion data to Google server-side via API or offline uploads to remove third-party cookie reliance completely.
• Implement the Google tag on select landing pages and switch all campaigns to manual bidding strategies to remove third-party cookie reliance completely.

The correct answer is: Implement the Google tag sitewide, unlocking privacy solutions like Enhanced conversions, consent mode, and the Attribution Reporting API.

Explanation: The answer is correct. To preserve conversion tracking after regulatory changes like the Digital Markets Act (DMA), which emphasizes user consent and data privacy, a marketer should implement the Google tag sitewide. This universal tag acts as the foundation for Google’s privacy-centric measurement solutions. By having the Google tag deployed across the entire website, it enables:

• Enhanced conversions: To recover more accurate conversion data by using hashed, consented first-party data.
• Consent mode: To adjust how Google tags behave based on user consent choices, modeling conversions for non-consenting users.
• Attribution Reporting API (part of Privacy Sandbox): A new, privacy-preserving way to measure ad clicks and views to conversions, designed for a future without third-party cookies.

These solutions work together to provide robust, privacy-safe measurement in a compliant manner.

Reference: Privacy-preserving measurement solutions – Google Ads Help: https://ads.google.com/home/privacy/solutions/ This page explicitly lists “Sitewide tagging,” “Enhanced conversions,” and “Consent mode” as key components of Google’s privacy solutions. While the Attribution Reporting API is a newer development, it’s part of the broader Privacy Sandbox initiatives Google is promoting for future measurement.