Product Analytics: Google Analytics, Mixpanel, Amplitude

Google Analytics 4

Setup

// GA4 setup
gtag('js', new Date());
gtag('config', 'G-XXXXXXXXXX');

// Track events
gtag('event', 'page_view');
gtag('event', 'signup', {
  'method': 'Google'
});

Mixpanel

Event Tracking

import mixpanel from 'mixpanel-browser';

mixpanel.init('YOUR-TOKEN');

// Track events
mixpanel.track('Button Clicked', {
  'button': 'Sign Up',
  'page': '/home'
});

// User properties
mixpanel.people.set({
  'plan': 'Premium',
  'signup_date': new Date()
});

Funnels

Track conversion funnels to see where users drop off.

Amplitude

Cohort Analysis

import amplitude from 'amplitude-js';

amplitude.getInstance().init('YOUR-API-KEY');

// Track user actions
amplitude.getInstance().logEvent('Page Viewed', {
  'page': '/dashboard',
  'referrer': 'google'
});

Retention Metrics

Measure user retention over time.

Key Metrics

1. 1DAU/MAU: Daily/Monthly Active Users
2. 2Retention: User return rate
3. 3Conversion: Signup/purchase rate
4. 4Churn: User loss rate
5. 5LTV: Lifetime Value

Best Practices

• Privacy: Anonymize PII
• Sampling: Use sampling for large datasets
• Segmentation: Break down by user segments
• Trends: Look at trends, not just absolutes

Tools

• Google Analytics 4: Free, comprehensive
• Mixpanel: Event-focused, great funnels
• Amplitude: Advanced cohort analysis
• PostHog: Open-source alternative

Data-driven decisions are better decisions!