Which Tracking Events Fire Automatically — and Which You Have to Build
Every event GA4 and the ad platforms can see falls into one of three buckets: automatic, built-in, or custom. This reference guide sorts all of it out across GA4, Meta, TikTok, Pinterest, Snapchat, Reddit, and LinkedIn — with a 46-event cross-reference table you can actually look things up in.
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7 Platform Pages
GA4, Meta, TikTok, Pinterest, Snapchat, Reddit, and LinkedIn — each page shows what fires on its own and what the platform's built-in catalog covers.
46-Event Cross-Reference Table
Every canonical event lined up across all seven platforms, so you can find the closest match in seconds instead of digging through docs.
Custom Event Playbook
What's left once automatic and built-in are handled, plus a 3-step method to name and build custom events that keep your reporting clean.
For marketers and analysts running GA4 alongside paid media.
Most marketers install a pixel, assume it tracks everything, and move on. It doesn't. GA4 has a real automatic layer, but every ad platform gives you a single base event on install and nothing more until you fire the rest yourself.
This guide lays out all three buckets — automatic, built-in, and custom — for GA4 and seven ad platforms, so you know exactly what you already have and what still needs to be built.
- ✓ Not sure if GA4 already tracks that action? Every automatic and built-in event is on one page — session_start, page_view, and the Enhanced Measurement events most people assume they have to wire up by hand.
- ✓ What does each pixel actually track on install? Meta, TikTok, Pinterest, Snapchat, and Reddit each give you one base event and nothing else. The guide names that base event for every platform.
- ✓ Guessing at Meta's event name vs. GA4's? The 46-event cross-reference table maps every canonical event across all seven platforms — a checkmark where there's a native match, a dash where there isn't.
- ✓ Need a conversion no platform names for you? The custom events section covers the ones your funnel actually needs — sales_page_view, pricing_page_view, cta_click — and why each one matters.
- ✓ Worried custom events will wreck your reports? Three steps: define the trigger, name it in lowercase snake_case, and mark it as a conversion only when it needs to count.
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Written by Someone Who's Set Up Tracking for Thousands of Businesses
Jeff Sauer has been working in digital analytics since 2005 and has trained 50,000+ marketers through MeasureU. He's implemented event tracking across GA4, Google Tag Manager, and every major ad platform — and built this reference to end the guesswork about which events you already have and which you still need to build.
Know exactly which events you already track — and which you still need to build
Download the guide, open it next to your GA4 and ad-platform setup, and work through your funnel one event at a time.