GTM Data Layer

GTM Data Layer User ID Setup

User identity tracking for cross-device analytics in GTM

Set up User ID tracking in your GTM data layer. Enable cross-device and cross-session analytics in GA4 with consistent user identification through your data layer.

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User ID tracking enables GA4 to stitch together a user's journey across multiple devices and sessions — essential for understanding true customer lifetime value and cross-device conversion paths. We implement User ID in your data layer on login, registration, and page load events (for logged-in users), with consistent ID values that match your CRM or backend system — enabling GA4's User ID reports, cross-device path analysis, and more accurate attribution.

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What's Included

Every deliverable you receive as part of this service.

User ID push on login and session start
Consistent ID format matching your backend
GA4 User ID reporting configuration
Cross-device user journey stitching
User properties in data layer (role, segment, plan)
Privacy-safe ID hashing options

Frequently Asked Questions

Common questions about GTM Data Layer User ID Setup.

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