Use when setting up Google Analytics 4 (GA4) for the first time on a website, web app, or mobile app (Android/iOS) — creating a Google Analytics account, property, and data stream; installing the Google tag (gtag.js) or wiring the Firebase SDK for mobile; turning on enhanced measurement; configuring events and key events (formerly "conversions"); setting data retention; handling EEA consent; or linking Google Ads/BigQuery/Search Console. Use whenever someone wants to add analytics, measurement, or tracking to their app or site, asks "how do I set up Google Analytics / GA4," or needs a Measurement ID (G-XXXXXXXXXX).
