Measurement Course • 8 chapters • 46 minutes

Stop guessing which channel drove the sale.

Explore this in-depth masterclass on measuring what marketing channels actually grows an eCommerce brand.

We explain 5 methods, their blind spots, and how to understand your marketing data.

Why this course exists

Running paid marketing is day-trading.

Your returns are only as good as the information you trade on, and most eCom brands trade on numbers their ad platforms grade themselves. There's no single “provable” answer for which channel drove a sale, only better and worse ways of getting close. This course hands you the five lenses, shows where each one lies to you, and teaches you how to make them agree.

01

No single source of truth.

Unlike revenue, attribution can't be “proven.” Trust comes from understanding the mechanics and assumptions behind every number.
02

Every method has a blind spot.

Click-based tools can't see awareness. Surveys can't see the middle. Knowing what each method misses is the whole game.
03

Speed compounds.

Better daily budget decisions compound into serious growth. That speed is the edge smaller brands hold over the giants.
Overview

eCom Measurement in 8 Chapters

13:26 min

Introduction to Marketing Measurement

What this section covers:
Why there's no single source of truthThe five measurement methodsSpeed as a structural edge

eCom brands pour 20 to 25% of revenue into marketing, which makes every daily budget call high-stakes, and measurement genuinely hard. This opening chapter lays out why there's no single provable truth for which channel drove a sale, why tool vendors are incentivised to make their own numbers shine, and introduces the five lenses you'll spend the rest of the course mastering.

25:23 min

Platform Attribution

What this section covers:
Attribution windows, decodedDouble-counting across platformsWhen to trust it, when not to

The numbers Meta, Google and TikTok report about themselves are convenient, free, and structurally biased. You'll see how default windows (Meta's 7-day click / 1-day view) inflate impact, why every platform happily claims the same purchase, and where opaque “modelled conversions” quietly fill the gaps. Essential for feeding the algorithms; dangerous as your only scoreboard.

34:50 min

Post-Purchase Surveys

What this section covers:
The one question that works20 to 50% response ratesImmune to privacy changes

The cheapest signal you're probably not using. One question on the order-confirmation page, “Where did you first hear about us?”, captures the podcast, the friend, the creator that never fired a pixel. You'll get the full setup: placement, 6 to 10 randomised options, follow-ups to kill ambiguity, and why to treat the data as directional only.

48:24 min

Multi-Touch Attribution (MTA)

What this section covers:
First-party beats last-clickWeighting credit, not splitting itThe click-based blind spot

The workhorse for day-to-day creative and campaign calls. Good MTA stitches the full journey with first-party and server-side tracking, resolves identity across devices, and weights credit intelligently instead of dumping it all on the last click. You'll learn why sloppy tracking silently loses 20 to 40% of conversions, and why even great MTA still under-credits awareness.

58:42 min

Marketing Mix Modeling (MMM)

What this section covers:
Baseline vs. incremental revenueSaturation & the next-euro questionNo cookies, no pixels

When click-based tracking goes blind on brand, TikTok and offline, modeling steps in. MMM reads aggregate spend and revenue to estimate each channel's true contribution, separates baseline sales from marketing-driven ones, and maps saturation curves so you know what the next euro actually buys. Privacy-safe, full-funnel, and increasingly daily thanks to Bayesian methods.

67:21 min

Incrementality Testing

What this section covers:
Geo-holdouts & synthetic controlIs retargeting actually incremental?Snapshots, not transferable truths

The closest thing to scientific proof. Geo-holdout tests run a channel in some regions and withhold it in others, then compare against a synthetic control to read true lift. You'll see how one brand proved an €850k awareness campaign drove a 6 to 7% incremental bump in new-customer revenue, and why results are snapshots, not universal laws.

75:27 min

Unified Attribution

What this section covers:
A confidence score per journeyDisagreement as signalDaily · full-funnel · ad-level

No single method wins, so you combine them. Unified attribution uses MTA as the daily backbone, folds in survey data, redistributes unattributed revenue to awareness channels via MMM, and anchors the whole thing to incrementality tests as a “truth prior.” Disagreement between methods becomes signal, not noise. The result: one model that's daily, full-funnel, and still actionable at the ad level.

82:39 min

Summary of Methods

What this section covers:
Match method to maturityGranularity vs. the full pictureBetter questions, better budgets

A clear map of which method to trust, when, and why, matched to your stage of growth. Early brands start with platforms and surveys; multi-channel brands add independent MTA; brands investing in awareness need MMM; at scale, geo-tests settle the big budget bets. The throughline: better questions beat false certainty, and that's how you see through marketing's half-truths.

Next steps

You just learned theory.
Now see it on your numbers.

Klar brings all five methods into one Single Source of Truth, so you can stop debating attribution screenshots and start steering budget toward profit.

+24%avg. growth with Klar
~2 hrsto onboard, start right away
Get started for free
A man with red hair is speaking into a microphone against a black background.
"Before using Klar we were very reliant on Meta and spend was hitting a ceiling. Klar gave us way more signals allowing us to aggressively scale up new channels without decreasing contribution margin."
Jonas Geuens, Director eCom @ Loop Earplugs
All

Real Attribution driving real Results for hundreds of brands.

Klar Icon
Eva Hibler
Eva Hibler
CMO
Bears with Benefits
A day in the life of Eva - CMO @ Bears with Benefits
Jonas Geuens
Jonas Geuens
Director of eCom
Loop Earplugs
How Loop Earplugs manages 9 million of adspend using Klar's Marketing Attribution
Teveo x Touchpoint
Teveo x Touchpoint
TEVEO
How Touchpoint & Klar Lifted TEVEO's Black Friday ROAS by 35%
Georg Blümer
Georg Blümer
Co-Founder & MD
Maniko Nails
Nailing Profitable Growth: How Maniko Polished Their Way to 744% Revenue Growth in 2 Years.
Johannes Sörensen
Johannes Sörensen
CEO
Ahead
How Ahead Cracked the 8-Figure-Code on Sugar-Free Success
Lise Le Petit
Lise Le Petit
Head of Growth & Performance Marketing
Stapelstein
Stacking the Odds: How Stapelstein Built a Performance Layer Without Losing Its Balance
Felix Keser
Felix Keser
CEO
Bergmensch
We were able to increase CM3 by +256% and have taken profit to new heights, thanks to Klar and Lars Budde.
shape labs x Beilmann
shape labs x Beilmann
Google Ads Scaling
shape labs
How shape labs achieved 4.489% ad spend growth & 40% CM3 increase with Klar & Beilmann's Google Ads strategy
Venen Engel x Divinely
Venen Engel x Divinely
Incrementality Scaling
Venen Engel
Scaling the Flow: How Divinely & Klar Mastered Incrementality for Venen Engel
Explore our Customer Stories
Free onboarding within just 2 hours, from growing brands to established multi-brand enterprises

For Brands
Make your data as actionable as it should be.

Free onboarding, 14 days trial, lifetime free support
Your data 100% hosted in Europe, fully GDPR compliant & ISO 27001-certified
Enabling you to understand your data with holistic strategy consulting & educational guidance

For Agencies
Let’s deliver software, expertise and money to you.

✓
All your customers' data in one place to optimize for actual business impact of your clients
✓
Exclusive partnership benefits for you and your clients with dedicated partner manager
✓
Kickback and eCom strategy consulting for mutual clients