Refactor remaining skills for progressive disclosure
Phase 2 refactoring of skills >500 lines and medium-sized skills: - paid-ads: 553 → 297 lines - Extract ad-copy-templates.md, audience-targeting.md, platform-setup-checklists.md - analytics-tracking: 541 → 292 lines - Extract ga4-implementation.md, gtm-implementation.md, event-library.md - ab-test-setup: 510 → 264 lines - Extract test-templates.md, sample-size-guide.md - copywriting: 458 → 248 lines - Extract copy-frameworks.md (headline formulas, section types) - page-cro: 336 → 180 lines - Extract experiments.md (experiment ideas by page type) - onboarding-cro: 435 → 218 lines - Extract experiments.md (onboarding experiment ideas) All skills now use progressive disclosure with references/ folders, keeping SKILL.md files focused on core workflow while detailed content is available when needed. Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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Corey Haines
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skills/analytics-tracking/references/ga4-implementation.md
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skills/analytics-tracking/references/ga4-implementation.md
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# GA4 Implementation Reference
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Detailed implementation guide for Google Analytics 4.
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## Configuration
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### Data Streams
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- One stream per platform (web, iOS, Android)
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- Enable enhanced measurement for automatic tracking
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- Configure data retention (2 months default, 14 months max)
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- Enable Google Signals (for cross-device, if consented)
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### Enhanced Measurement Events (Automatic)
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| Event | Description | Configuration |
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|-------|-------------|---------------|
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| page_view | Page loads | Automatic |
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| scroll | 90% scroll depth | Toggle on/off |
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| outbound_click | Click to external domain | Automatic |
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| site_search | Search query used | Configure parameter |
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| video_engagement | YouTube video plays | Toggle on/off |
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| file_download | PDF, docs, etc. | Configurable extensions |
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### Recommended Events
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Use Google's predefined events when possible for enhanced reporting:
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**All properties:**
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- login, sign_up
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- share
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- search
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**E-commerce:**
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- view_item, view_item_list
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- add_to_cart, remove_from_cart
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- begin_checkout
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- add_payment_info
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- purchase, refund
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**Games:**
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- level_up, unlock_achievement
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- post_score, spend_virtual_currency
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Reference: https://support.google.com/analytics/answer/9267735
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---
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## Custom Events
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### gtag.js Implementation
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```javascript
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// Basic event
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gtag('event', 'signup_completed', {
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'method': 'email',
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'plan': 'free'
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});
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// Event with value
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gtag('event', 'purchase', {
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'transaction_id': 'T12345',
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'value': 99.99,
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'currency': 'USD',
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'items': [{
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'item_id': 'SKU123',
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'item_name': 'Product Name',
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'price': 99.99
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}]
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});
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// User properties
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gtag('set', 'user_properties', {
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'user_type': 'premium',
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'plan_name': 'pro'
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});
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// User ID (for logged-in users)
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gtag('config', 'GA_MEASUREMENT_ID', {
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'user_id': 'USER_ID'
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});
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```
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### Google Tag Manager (dataLayer)
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```javascript
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// Custom event
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dataLayer.push({
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'event': 'signup_completed',
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'method': 'email',
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'plan': 'free'
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});
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// Set user properties
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dataLayer.push({
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'user_id': '12345',
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'user_type': 'premium'
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});
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// E-commerce purchase
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dataLayer.push({
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'event': 'purchase',
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'ecommerce': {
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'transaction_id': 'T12345',
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'value': 99.99,
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'currency': 'USD',
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'items': [{
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'item_id': 'SKU123',
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'item_name': 'Product Name',
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'price': 99.99,
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'quantity': 1
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}]
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}
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});
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// Clear ecommerce before sending (best practice)
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dataLayer.push({ ecommerce: null });
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dataLayer.push({
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'event': 'view_item',
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'ecommerce': {
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// ...
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}
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});
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```
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---
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## Conversions Setup
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### Creating Conversions
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1. **Collect the event** - Ensure event is firing in GA4
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2. **Mark as conversion** - Admin > Events > Mark as conversion
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3. **Set counting method**:
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- Once per session (leads, signups)
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- Every event (purchases)
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4. **Import to Google Ads** - For conversion-optimized bidding
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### Conversion Values
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```javascript
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// Event with conversion value
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gtag('event', 'purchase', {
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'value': 99.99,
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'currency': 'USD'
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});
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```
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Or set default value in GA4 Admin when marking conversion.
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---
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## Custom Dimensions and Metrics
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### When to Use
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**Custom dimensions:**
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- Properties you want to segment/filter by
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- User attributes (plan type, industry)
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- Content attributes (author, category)
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**Custom metrics:**
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- Numeric values to aggregate
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- Scores, counts, durations
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### Setup Steps
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1. Admin > Data display > Custom definitions
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2. Create dimension or metric
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3. Choose scope:
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- **Event**: Per event (content_type)
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- **User**: Per user (account_type)
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- **Item**: Per product (product_category)
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4. Enter parameter name (must match event parameter)
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### Examples
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| Dimension | Scope | Parameter | Description |
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|-----------|-------|-----------|-------------|
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| User Type | User | user_type | Free, trial, paid |
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| Content Author | Event | author | Blog post author |
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| Product Category | Item | item_category | E-commerce category |
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---
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## Audiences
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### Creating Audiences
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Admin > Data display > Audiences
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**Use cases:**
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- Remarketing audiences (export to Ads)
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- Segment analysis
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- Trigger-based events
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### Audience Examples
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**High-intent visitors:**
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- Viewed pricing page
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- Did not convert
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- In last 7 days
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**Engaged users:**
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- 3+ sessions
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- Or 5+ minutes total engagement
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**Purchasers:**
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- Purchase event
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- For exclusion or lookalike
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---
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## Debugging
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### DebugView
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Enable with:
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- URL parameter: `?debug_mode=true`
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- Chrome extension: GA Debugger
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- gtag: `'debug_mode': true` in config
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View at: Reports > Configure > DebugView
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### Real-Time Reports
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Check events within 30 minutes:
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Reports > Real-time
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### Common Issues
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**Events not appearing:**
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- Check DebugView first
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- Verify gtag/GTM firing
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- Check filter exclusions
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**Parameter values missing:**
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- Custom dimension not created
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- Parameter name mismatch
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- Data still processing (24-48 hrs)
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**Conversions not recording:**
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- Event not marked as conversion
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- Event name doesn't match
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- Counting method (once vs. every)
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---
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## Data Quality
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### Filters
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Admin > Data streams > [Stream] > Configure tag settings > Define internal traffic
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**Exclude:**
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- Internal IP addresses
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- Developer traffic
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- Testing environments
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### Cross-Domain Tracking
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For multiple domains sharing analytics:
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1. Admin > Data streams > [Stream] > Configure tag settings
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2. Configure your domains
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3. List all domains that should share sessions
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### Session Settings
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Admin > Data streams > [Stream] > Configure tag settings
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- Session timeout (default 30 min)
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- Engaged session duration (10 sec default)
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---
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## Integration with Google Ads
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### Linking
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1. Admin > Product links > Google Ads links
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2. Enable auto-tagging in Google Ads
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3. Import conversions in Google Ads
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### Audience Export
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Audiences created in GA4 can be used in Google Ads for:
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- Remarketing campaigns
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- Customer match
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- Similar audiences
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