GTM Performance Audit

Analyze Google Tag Manager implementations for performance impact using Chrome DevTools MCP.

Philosophy

Tag managers are powerful but can silently degrade performance. Every tag has a cost.

Core Beliefs

1. Measure Tag Impact Individually: Each tag's cost must be measured, not assumed
2. Container Size Is a Leading Indicator: Large containers correlate with poor performance
3. Triggers Are the Multiplier: Inefficient triggers amplify tag cost exponentially
4. Server-Side Is the Future: Move data collection off the main thread when possible

Why GTM Audits Matter