Questions & answers. Consent Mode v2, CMP and Google Analytics consent.

FAQ - Consent Mode & CMP

Answers on Google Consent Mode v2, CMP platform selection, Basic vs Advanced modes and rollout audit in GTM and GA4.

9 questions in 3 categories

CMP platforms

How do I choose a CMP platform?

Depends on scale, budget, TCF 2.2 and stack (GTM, CMS). Use the CMP platform catalog and platform selector for three recommendations.

Cookiebot or Usercentrics for a small site?

Both are Google CMP partners and work well for SMB. Cookiebot - popular globally, free tier up to 50 subpages. Usercentrics - stronger in DACH and EU enterprise. Compare in the CMP catalog alongside OneTrust and Didomi.

Must a CMP be Google-certified?

Not legally required, but Google CMP partners have ready-made Consent Mode v2 integrations and documentation - faster rollout.

Rollout and audit

In what order should I roll out CMP and Consent Mode?

1) Pick Basic/Advanced mode, 2) choose CMP, 3) configure default consent in GTM, 4) wire consent update, 5) test in Tag Assistant and DebugView. Path in the consent & measurement hub.

How do I verify the rollout?

Use the Consent Mode v2 checklist and GTM checklist. In the browser: GTM Preview, GA4 DebugView, Consent tab in Tag Assistant.

Why do Google Ads conversions drop after the banner?

Common causes: missing Consent Mode v2, wrong mode (Basic without modeling at high decline rates), wrong CMP category mapping, or tags firing before consent update. Consider Advanced after legal review.