Stop 08 · Marketing Analytics & DataTopics · 3/11

Marketing Funnels & Conversion Tracking

In short

Thousands visit, a handful buy. Somewhere between, people drop off. A tracked funnel shows exactly which step is leaking, so you fix the right thing.

Setting up analytics to track a user's path through defined steps (landing → signup → purchase) and where they drop off — the data foundation for any conversion-rate-optimization work.

The blob holds a wrench and peers at a long pipe with a few little drips.

Think of it like this

The leaky water pipe

Water from the overhead tank reaches your tap as a trickle. You don't replace the whole pipeline. You walk along it and find the biggest leak. A funnel report is that walk, step by step.

Watch it happen

An online store's purchase funnel

Visit

Product

Cart

Checkout

Purchase

1/510,000 people visit the site this week.

The big ideas

What you need to know

Define the steps

Write the exact events that mark each step, like view_item, add_to_cart, begin_checkout, purchase.

Step conversion rates

Divide each step by the one before. The lowest rate is usually your biggest opportunity.

Track the final action

Fire a conversion on the thank-you page or after the server confirms payment, not on button click.

Segment the funnel

Compare mobile vs desktop or new vs returning. Leaks often hide in one segment.

Save yourself the pain

Common mistakes

Oops

Counting a purchase when someone clicks 'Pay'.

Do this instead

Payments fail. Count the conversion only after a successful order confirmation.

Oops

Only looking at the overall conversion rate.

Do this instead

Break it into steps to see where people actually leave.

Your mission

Build a funnel in the GA4 demo

~30 min

Quick check

Cart to checkout is 50%, checkout to purchase is 90%, product to cart is 8%. Where should you focus first?

Go deeper

1Define a 3-4 step funnel for a hypothetical product and identify what to track at each step.
2Learn to set up a conversion event in GA4 for a specific desired action.
3Practice interpreting a funnel drop-off and forming a hypothesis for the cause.