GlossaryGrowth & analytics
What is a conversion funnel?
Also called: marketing funnel, sales funnel, AARRR, pirate metrics, funnel analysis
Definition
A conversion funnel is the sequence of steps a person takes from first discovering your product to becoming a paying customer, such as visit, sign-up, activation and purchase, with the percentage who move from each step to the next.
Conversion funnel, explained
Every business has a funnel whether it tracks one or not. A typical SaaS version: visits to the site, sign-ups, activation, conversion to paid, and retention or expansion. Dave McClure's "pirate metrics" framework, AARRR, names a common version: acquisition, activation, retention, referral, revenue.
The value is in the step-to-step conversion rates. If 1,000 visitors become 50 sign-ups (5%), 20 activate (40%) and 4 pay (20%), you can see where the biggest drop is and where effort pays off most. Doubling activation from 40% to 80% doubles paying customers without a single extra visitor.
Break funnels down by source. Visitors from a launch platform, a comparison page, a directory and a newsletter sponsorship behave differently. Some channels bring many visitors who rarely sign up; others bring few who almost all convert. Judging channels by visits alone misleads.
Keep step definitions stable and measurable: a sign-up is an account created, activation is a specific event, a customer is a first successful payment. Track funnels by cohort (people who entered in the same week) rather than mixing everyone together, so a change you made shows up clearly.
Funnels also clarify where SEO and content fit. Top-of-funnel pages like guides and glossaries bring awareness; comparison, alternatives and pricing pages sit near the bottom and convert. A healthy content plan covers both, with internal links that help readers move down.
Why it matters for founders
A funnel shows the single step where most potential customers are lost. Fixing that step usually does more than any new channel.
Example
A startup's funnel shows 6% of visitors sign up but only 15% of sign-ups connect their data. It adds a guided setup and sample data, activation doubles, and paid conversions rise with the same traffic.
Common mistakes
- Measuring only the top (traffic) and bottom (revenue).
- Mixing all traffic sources into one funnel.
- Changing step definitions midway and comparing numbers anyway.
Related terms
- Activation rateActivation rate is the percentage of new users who reach a defined "activation" event, the first point where they get real value from your product, within a set time after signing up.
- Landing pageA landing page is a web page designed for visitors arriving from a specific source, such as an ad, launch, email or search, with a single goal like signing up, starting a trial or joining a waitlist.
- A/B testAn A/B test randomly splits visitors between two versions of a page or feature, A and B, and compares a chosen metric, such as sign-up rate, to see which version performs better beyond chance.
- Customer acquisition cost (CAC)Customer acquisition cost (CAC) is the total sales and marketing spend in a period divided by the number of new customers won in that period. It tells you what it costs, on average, to get one paying customer.
- Click-through rate (CTR)Click-through rate (CTR) is the share of impressions that turned into clicks: clicks divided by impressions. In Search Console it shows how often people who saw your result in Google chose it.