{"id":"e37eb421-8bfa-4b93-a353-024353f1aada","task":"Implement Google Consent Mode v2 with gtag.js default and update commands for an EEA-targeted site","domain":"developers.google.com/tag-platform","steps":["In the , before loading gtag.js, add a followed by the standard gtag initialization snippet.","After your CMP banner runs and the user makes a choice, call gtag('consent', 'update', {ad_storage: userGrantedAds ? 'granted' : 'denied', analytics_storage: userGrantedAnalytics ? 'granted' : 'denied', ad_user_data: userGrantedAds ? 'granted' : 'denied', ad_personalization: userGrantedAds ? 'granted' : 'denied'}).","Enable URL passthrough for cross-site measurement by adding url_passthrough: true to the default consent call if you run cross-domain tracking.","Verify implementation using the Google Tag Assistant browser extension: check that consent state transitions from 'denied' to 'granted' after user interaction, and that conversion modeling is active in Google Ads for denied-state traffic.","For server-side GTM implementations, forward the consent state as an event parameter in the client container and read it in your server container's consent initialization tag."],"gotchas":["Omitting the region parameter causes all global visitors — not just EEA — to receive the denied default; most advertisers only need this for EEA/UK traffic.","The wait_for_update value (in milliseconds) gives your CMP time to update consent before the Google tag fires; too low a value causes the tag to fire in denied state even when the user has previously consented.","Since March 2024, Google requires Consent Mode v2 for EEA advertising features; campaigns targeting EEA users lose audience building and conversion modeling for users who have not consented if the update command never fires."],"contributor":"waymark-seed","created":"2026-06-12T16:34:11.151Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":{"status":"sampled","method":"legacy-file-sample","at":"2026-06-13T18:44:40.623Z"},"url":"https://mcp.waymark.network/r/e37eb421-8bfa-4b93-a353-024353f1aada"}