Module 1: Funnel Fundamentals
A funnel is simply the path a stranger walks to become a customer, designed on purpose instead of left to chance. This module gives you the mental model: the stages every funnel has, the math that tells you if yours works, and how to map your first one on paper before you build anything.
What a funnel actually is
Strip away the jargon and a funnel has four stages: attention (someone discovers you), interest (they give you their email for something valuable), desire (your follow-up makes them want the offer), and action (they buy). Every business already has these stages happening informally — a funnel just means you designed each step deliberately and can measure what happens at each one.
Here's what this looks like in practice. A plumber posts a video about fixing a burst pipe (attention). Viewers trade their email for a one-page "what to do before the plumber arrives" checklist (interest). Over two weeks they get three short emails: a before-and-after story, why cheap fixes fail, and honest pricing guidance (desire). When their own pipe bursts, they call the name they trust (action). Because each step was designed, the plumber can see exactly where people drop off and fix it.
Funnel math
The four stages, in order
Teaching example — your numbers will differ. The lesson is the shape.
How it narrows
Build brief
Describe your funnel in words: how does a stranger discover you today, and what are the steps between that moment and a purchase?
Saved
The only math that matters
Four numbers run every funnel: conversion rate at each stage, cost per lead, customer acquisition cost, and customer lifetime value. You don't need a statistics degree — you need to know that if 100 people visit your landing page and 20 give their email, your conversion rate is 20%, and if 2 of those 20 buy a $500 service, each customer cost you whatever you spent to get those 100 visitors divided by 2.
The golden rule: your customer acquisition cost must stay comfortably below your customer lifetime value. If a customer is worth $2,000 over their lifetime and it costs you $300 to acquire one, your funnel is a money machine — you can afford to spend more on traffic. If acquisition costs $1,800 for that same $2,000 customer, the funnel is broken no matter how pretty it looks. Math first, design second.
Set up a one-page funnel scorecard before you launch: traffic in, email conversion rate, email-to-sale conversion rate, revenue. Update it weekly. These four numbers will tell you exactly which stage to fix, which is the difference between guessing and growing. A funnel you measure is an asset; a funnel you don't is a decoration.
Funnel math
The only math that matters
Funnel math worksheet — fill in your numbers:
Visitors to landing page: _____
Opt-in rate (emails ÷ visitors): _____%
Emails collected: _____
Buyers (sales ÷ emails): _____
Total ad spend: $_____
Customer acquisition cost (spend ÷ buyers): $_____
Customer lifetime value: $_____
Healthy if: acquisition cost is comfortably BELOW lifetime value.
Build brief
What are your current numbers — or your best honest guesses — for monthly visitors, leads, and customers?
Saved
Map your funnel on paper first
For each box, write the single job it has to do. The ad's job is only to earn the click. The landing page's job is only to earn the email. The email sequence's job is only to earn the reply or the purchase. When every step has exactly one job, you can test and fix each step independently — which is the whole secret of funnel optimization.
The five-box funnel, annotated
Building the funnel inside software first — clicking through a funnel builder, wiring automations, designing pages — before ever sketching what it should do. You end up with an impressive-looking machine that optimizes the wrong thing. Software makes a good funnel faster; it can't make a confused funnel good. Sketch boxes and arrows on paper first: what the visitor gets and what you ask for in each box. If you can't draw it simply, you don't understand it yet.
Funnel math
Plug in your numbers and see the whole funnel at a glance. Everything updates live.
Email leads:0
Customers:0
Revenue:0
Sketch your funnel on paper: five boxes (ad/post → landing page → thank-you page with intro offer → email sequence → core offer), arrows between them, and one sentence in each box saying what the visitor gets and what you ask for. Photograph it — that's your funnel blueprint.
A business gets plenty of website visitors but almost no email signups. Which funnel stage is broken?