Cookie deprecation is no longer a future event. Any campaign still relying purely on the client-side Meta pixel is leaving 25-40% of conversions invisible to the algorithm — and the algorithm trains on what it can see.
Server-side Google Tag Manager paired with Meta's Conversions API gives you a single, owned data layer. Your server is the source of truth, not the user's browser.
We deploy this stack as standard for every paid-media client. Median lift in Meta-attributed conversions: +28% within the first 14 days.