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Ad Tracking Diagnostic — Wiki

Live tool: https://itallstartedwithaidea.github.io/ad-tracking-diagnostic

The Core Flow

Google Ad Click
  │  URL: landing-page.com/?gclid=XXXXX&utm_source=google&utm_medium=cpc
  ▼
GTM Script fires on ALL pages
  │  • Reads gclid from URL → stores in localStorage (90-day expiry)
  ▼
User navigates to form page
  │  • Script reads gclid from localStorage
  │  • Writes to hidden form field
  ▼
Form submitted → CRM Lead/Contact created with GCLID value
  ▼
Google Ads Data Manager / HubSpot integration imports GCLID
  │  • Matches GCLID to original ad click
  ▼
Offline conversion recorded → feeds Smart Bidding ✅

Documentation Index

Page	Description
GTM Deployment	Step-by-step setup for all platforms
Salesforce Setup	Web-to-Lead, Marketo, Data Manager
HubSpot Setup	Native integration + localStorage fallback
WordPress Setup	Gravity Forms, CF7, WPForms, Elementor
Shopify Setup	Theme, checkout URL forwarding, purchase conversions
Troubleshooting	Common issues and fixes
Console Debugging	DevTools techniques

Key Limits

Limit	Detail
90-day cutoff	Conversions older than 90 days after click permanently rejected
4–6 hour delay	Wait after creating conversion action before first import
14-day lookback	First-ever import only goes back 14 days
No auto-retry	Failed imports must be manually triggered
1 object/connection	Lead + Opportunity each need their own Data Manager connection
Production only	Salesforce sandbox not supported