What is Google Analytics?
Google Analytics is Google's free website and app analytics platform, used by over 56 million websites worldwide to track visitors, measure marketing campaigns, and understand user behaviour. The current version, Google Analytics 4 (GA4), fully replaced the older Universal Analytics on July 1, 2023.
GA4 uses an event-based data model (instead of session-based) and offers AI-powered insights, cross-device tracking, and deeper integration with Google Ads, Search Console, and BigQuery — all for free up to 10 million events/month.
📌 Quick Access
Login directly at analytics.google.com with any Google account that has been granted access to a property.
How to Set Up Google Analytics (GA4)
Go to analytics.google.com → Admin → "Create Account" → name your account (usually your company/site name).
Add your website/app name, select timezone and currency, then click Next.
Choose Web, iOS or Android. For web, enter your site URL — this generates your Measurement ID (G-XXXXXXX).
Copy the Google tag snippet and paste it in your site's <head> section, or connect via Google Tag Manager, or use a CMS plugin.
Visit your site, then check Analytics → Reports → Realtime — you should see your own visit appear within seconds.
GA4 vs Universal Analytics — Key Differences
| Feature | Universal Analytics | GA4 (Current) |
|---|---|---|
| Data Model | Session-based | Event-based |
| Status | ❌ Sunset July 2023 | ✅ Active, recommended |
| Cross-platform tracking | Limited (separate app view) | ✅ Unified app + web |
| AI Insights | No | ✅ Predictive metrics built-in |
| Bounce Rate | Sessions with no interaction | Inverse of Engagement Rate |
| Cookie dependency | High | Reduced, privacy-focused |
| BigQuery Export | Paid (360) only | ✅ Free tier included |
Key Reports & Metrics in GA4
- Realtime report — See active users on your site right now, by location and source
- Acquisition report — Where your traffic comes from (Organic Search, Direct, Social, Paid)
- Engagement report — Which pages/events users interact with most
- Monetisation report — E-commerce purchases, revenue, and AdSense earnings (if linked)
- Retention report — How many users return after their first visit (1-day, 7-day, 28-day)
- Demographics report — Age, gender, interests and location of your audience
- Tech report — Devices, browsers, and operating systems your visitors use
| Metric | What It Means |
|---|---|
| Users | Unique individuals who visited your site/app |
| Sessions | Total visits, including repeat visits by the same user |
| Engagement Rate | % of sessions lasting 10+ seconds, had a conversion, or 2+ pageviews |
| Avg Engagement Time | Average time site was in focus in the user's browser tab |
| Conversions | Key actions you've marked important (purchase, signup, etc.) |
Troubleshooting — No Data in Analytics?
| Problem | Solution |
|---|---|
| No data at all | Verify tag installation using Google Tag Assistant browser extension |
| Data delayed | New properties can take 24-48 hours to start showing standard reports (Realtime is instant) |
| Traffic looks too low | Check if ad-blockers are stripping your tracking script for some visitors |
| Duplicate pageviews | Tag installed twice (e.g. manually + via plugin) — remove one |
| Wrong timezone in reports | Admin → Property Settings → check Reporting Time Zone |