Full Answer
Diagnosing GA4 no data: Immediate checks: 1. Real-Time report:
- Go to Reports → Real-Time
- Should show current visitors
- If zero → tracking not working 2. Measurement ID: 3. Data stream status:
- Admin → Data Streams
- Status must be "Active"
- If paused → no data collected 4. Script loading: Common mistakes:
- Copied Measurement ID wrong
- Script on staging, not production
- Ad blocker on your own browser
- Internal traffic filter excluding you Quick test: Open incognito, visit site, check Real-Time immediately.