GTM Form Submission Trigger Not Firing? 7 Checks to Fix It and Track Leads in GA4
A contact form nobody measures is a lead source nobody can improve. Yet form tracking is the setup most people get wrong in Google Tag Manager: […]
From the blog
Duplicate GTM Containers on One Site: How to Find Them, Choose One, and Remove the Other Safely
Quick answer Two GTM containers on one site double every event, and nobody dares remove either. Do it as a protocol instead: detect every container, inventory […]
TikTok Events API via Server GTM: Setup, One Event ID, and Deduplication That Actually Works
Quick answer Through server-side GTM, the TikTok Events API works as a second copy of your web events — and deduplication is decided on the web […]
WooCommerce DataLayer Not Pushing Events: Why It’s Empty and How to Fix Each Cause
Quick answer WooCommerce core pushes nothing to the dataLayer by itself — every ecommerce event comes from a plugin or custom code. So an empty dataLayer […]
GTM Preview Mode Not Connecting: 8 Causes, a Diagnosis Order, and Fixes
Quick answer GTM Preview almost never fails at random: it needs the same container ID on the page, loaded in the browser where you launched Preview, […]
Meta Events Not Showing in Events Manager? Split Browser vs Server First, Then Fix the Cause
Quick answer If the Pixel fires but events don’t show, the likely causes, in order: you’re looking at the aggregated overview, which is delayed and, at […]
Consent Mode v2 Not Working? 7 CMP Wiring Mistakes and the GTM Fix Order
You set up a Consent Management Platform (CMP), the banner shows, and GA4 still says consent denied. Or Google Ads says your consent setup is wrong. […]
Meta CAPI Deduplication Not Working? The event_id Checks and Fixes
Quick answer Meta merges a browser event and a server event only when both carry the same event_name and the same event_id, on the same Pixel. […]
Duplicate Purchase Events in GA4: 8 Causes, a 5-Minute Diagnosis, and Fixes That Hold
Quick answer Duplicate purchase events in GA4 come from two senders formatting the same order differently, a repeated push with a missing or changing transaction_id, or […]
GA4 Purchase Missing, Items (Not Set) or $0 Revenue? 10 DataLayer Fixes
By Humayun Kabir Naim — 7 November 2026 Quick answer A missing, (not set) or $0-revenue GA4 purchase is almost always one break in the same […]