In short: The marketing funnel is a useful model of stages that need different things and a poor model of how individuals actually buy. Find the stage that limits revenue now, concentrate there, and treat "full-funnel" as a warning sign rather than a plan.
Key points
- The stages are awareness, consideration, evaluation, purchase, and retention and advocacy.
- Real buying is not linear; people enter at any stage, skip stages and loop back.
- More at the top does not produce more at the bottom if the middle is broken.
- "Full-funnel" usually means spending in every channel without deciding which stage is the constraint.
- Draw the funnel with last quarter's real numbers and redraw it each quarter.
The funnel is the oldest model in marketing: a wide opening of people who have never heard of you, narrowing through stages of awareness, interest, and evaluation, to a small number who buy. It is more than a century old, everyone uses it, and it is worth understanding both for what it explains and for what it hides.
The stages, plainly
Awareness. The person learns the company or the category exists. Measured, badly, by reach and impressions, and better by recall and branded search.
Interest or consideration. The person recognizes the problem as theirs and includes the company among possible solutions. Measured by content engagement, return visits, sign-ups, and questions asked.
Evaluation or intent. The person is actively comparing options and looking for proof. Measured by demo requests, trials, pricing views, sales conversations.
Purchase. The person buys. Measured by revenue, and by the cost of everything above divided by the number who reached here.
Retention and advocacy. Often drawn as a second funnel or a loop. The person stays, expands, and tells others. Measured by retention, expansion, and referral.
What the model gets right
People do move through stages, and the stages need different things. Someone who has never heard of a category will not respond to a comparison chart, and someone comparing three vendors does not need to be told the problem exists. Matching content and channel to stage is the funnel's durable lesson.
The model also makes conversion between stages visible. If a thousand people reach evaluation and ten buy, the problem is in evaluation, not in awareness, and spending more at the top makes it worse.
What the model gets wrong
Real buying is not linear. People enter at any stage, skip stages, loop back, and are influenced by things no funnel records: a colleague's recommendation, a podcast heard six months ago, a competitor's failure. The funnel describes an average path that almost nobody takes individually.
The model also encourages the belief that more at the top produces more at the bottom. It does not, if the middle is broken or the top is filled with the wrong people. A funnel full of unqualified awareness is expensive at every stage below.
Why "full-funnel" usually means nothing
"Full-funnel marketing" is the claim that a company or agency addresses every stage. In practice it usually means spending in every channel without deciding which stage is the constraint. It sounds thorough. It is often the absence of a decision dressed as completeness.
A useful plan identifies which stage is actually limiting revenue right now and concentrates there. A company nobody has heard of has an awareness constraint. A company with traffic and no sign-ups has a consideration constraint. A company with trials that do not convert has an evaluation or product constraint. Each calls for different spending, and spending on the others is waste until the constraint moves.
How to use it well
Draw the funnel with real numbers for the last quarter: how many at each stage, and the conversion between each. Find the stage where the drop is largest relative to what a healthy business would show. Put the next quarter's effort there. Redraw it each quarter, because the constraint moves once it is fixed.
And remember that for a company the ad platforms restrict, the top of the funnel is partly closed in the crowded channels and open in the thinly bid ones. The funnel does not change. Where it can be filled does.
lowob takeaway: The funnel is a useful model of stages that need different things and a poor model of how individuals actually buy. Find the stage that limits revenue now, concentrate there, and treat "full-funnel" as a warning sign rather than a plan.
Common questions
What are the stages of a marketing funnel?
Awareness, interest or consideration, evaluation or intent, purchase, and retention and advocacy, which is often drawn as a second funnel or loop.
What is wrong with full-funnel marketing?
In practice it usually means spending in every channel without deciding which stage is the constraint. It is often the absence of a decision dressed as completeness.
How do I find the bottleneck in my marketing funnel?
Draw the funnel with real numbers for the last quarter, find the stage where the drop is largest relative to a healthy business, and put the next quarter's effort there.
Does spending more on awareness increase sales?
Not if the middle of the funnel is broken or the top is filled with the wrong people. A funnel full of unqualified awareness is expensive at every stage below.