Pulsar · Metrics playbook · No. 02 · Real funnel from the test pixel, 30-day window (distinct visitors — people, not raw events).
Quantity vs. Quality
CPM and clicks buy visits, not customers — the funnel is the first step in qualifying your traffic.
Companion to No. 01 — Efficiency & Fatigue.
Contents
01 The trap at the top of the funnel · 02 What each metric actually measures · 03 The real funnel · 04 Data qualification: the filter ladder · 05 Why cheap traffic can be expensive · 06 Diagnosing where quality breaks · 07 What to optimize instead
The trap at the top of the funnel
CPM, CPC, CTR, clicks, sessions, visits are all QUANTITY metrics — they measure how many people you REACHED and how many ARRIVED at the site. They say NOTHING about whether those people actually WANT your product.
A cheap CPM with a flood of clicks can still be worthless. On this very site, roughly 60% of the visitors who reached it never even looked at a product — they clicked, but they didn’t need what’s being sold. Every one of those clicks looked identical to a good click in the CPM, CPC and CTR columns.
Clicks tell you how many people showed up. They don’t tell you how many wanted what you’re selling.
What each metric actually measures
Split the dashboard in two: above the funnel’s mouth sits the quantity you buy; inside the funnel is the quality you earn.
Quantity metrics price reach and arrival — “how many showed up.” Quality metrics measure intent and outcome — “how many wanted it.” Click any chip to see which side it belongs to and why.
Quantity · reach & arrival
“How many showed up”
Above the funnel’s mouth — you can buy these.
Quality · intent & outcome
“How many wanted it”
Inside the funnel — you have to earn these.
You can BUY quantity. You have to EARN quality. CPM is the price of the door, not the price of a customer.
The real funnel — one month of real traffic, qualified step by step
Distinct visitors on the test pixel, 30-day window. Six stages; each one qualifies the traffic a little harder — and the counts collapse.
One month of real traffic, qualified step by step
Distinct visitors on the test pixel, 30-day window. Hover a stage for the exact numbers.
Data qualification — the funnel as a filter ladder
This funnel is the FIRST STEP in data qualification.
Each stage progressively QUALIFIES raw traffic into real intent — the funnel is a series of filters: Raw traffic (unqualified quantity) → Viewed a product (showed interest) → Added to cart (intent) → Started checkout (strong intent) → Shared details (commitment) → Purchased (a qualified customer).
This is step one — later qualification layers (match quality, identity, persona intent) refine it further.
Why cheap traffic can be expensive
Because only quality converts, a cheap CPM does NOT mean cheap customers. The identity below is the whole argument.
Halving your CPM saves a little on every visit. Doubling your view-product rate can halve your cost PER CUSTOMER. Quality moves CPA far more than cheap clicks do.
How many people arrive at the site per month.
Optional — set to 0 to hide cost per customer.
The QUALITY lever — the share of visits that become customers.
The QUANTITY lever — a realistic haggling range for the price of a visit (−20% … +25%).
Which lever actually moves cost per customer?
Each bar shows the full range of cost-per-customer you can reach by moving ONE lever across its whole slider, holding the other at its current value.
This calculator is interactive in the HTML version. The observed month: 3,675 visits, 0.27% end-to-end conversion → 10 customers — roughly 1 buyer per 368 visitors, whatever the CPM.
Cross-reference — See Lecture 01 — Efficiency & Fatigue for the full CPM → CPC → CPA chain.
Diagnosing WHERE quality breaks
Each funnel drop points at a different fix — and none of it is visible in CPM.
| Symptom | Observed here | Diagnosis | Fix |
|---|---|---|---|
| Many visits, low VIEW-PRODUCT | 41.6% viewed / 58% bounce | Wrong AUDIENCE or ad-to-landing mismatch. You bought traffic that doesn’t want it, or the ad over-promised. | Fix targeting + message-match. |
| Good views, low ADD-TO-CART | viewed→cart drops 94% | Product / price / page-persuasion problem. | Product page, pricing, social proof. |
| Carts but no CHECKOUT | 60.2% of carts stall | Friction, trust, shipping cost, forced account. | Shorten the path; show costs early; guest checkout. |
| Checkout but no PURCHASE | final-step drop | Payment options, security confidence, final-price shock. | More payment methods; reassure; no surprise fees. |
Rule — the stage with the biggest drop is where your money is leaking — and it’s a QUALITY problem, not a CPM problem.
What to optimize instead
Don’t chase a cheaper CPM; chase QUALIFIED traffic.
Bring people who already want it — better audience + message-market fit — and fix the FIRST qualification gate (view-product) before buying more clicks. Optimize downstream intent rates, not top-of-funnel volume: a point of view-product rate or add-to-cart rate is worth more than any discount on the door price.
More traffic multiplies whatever quality you already have. If quality is broken, more traffic just means more wasted clicks — faster.