Horizon GrowthDigital Marketing

E-commerce + CRO

E-commerce Store: Scaling Paid Acquisition Without Losing Margin

Direct-to-consumer e-commerce, USA

The sequence we follow when an online store has traffic and revenue but shrinking contribution margin as spend increases.

The Situation

What Usually Goes Wrong

A store reaches a ceiling where every additional dollar of ad spend returns less than the last, and return on ad spend slowly erodes while revenue still technically grows.

The usual causes are all fixable and all invisible in a platform dashboard: a product feed built for the warehouse rather than for search, a checkout that leaks on mobile, and email flows that were set up once and never segmented.

Reporting on return on ad spend alone hides the real problem, because it says nothing about contribution margin or whether those customers ever come back.

What we measure

Contribution marginPrimary metric
Checkout completion rateConversion
Repeat purchase rateRetention
Blended customer acquisition costEfficiency

Baselines are captured in the first 30 days so every later change is measured against a documented starting point.

Typical timeline: Audit and quick wins in weeks 1–6, retention flows live by month 2.

The Approach

The Sequence We Follow

Order matters more than effort here. Doing these in the wrong sequence is how budgets get spent without moving the number.

Step 01

Report on margin, not just ROAS

We rebuild reporting around contribution margin after cost of goods, shipping and fees. It is common for the campaign with the best return on ad spend to be selling the least profitable products.

Step 02

Rebuild the product feed

Titles restructured around real search language, missing attributes completed, and campaigns segmented by margin band so budget concentrates on products worth selling.

Step 03

Fix the checkout before scaling spend

Mobile checkout testing, shipping cost transparency earlier in the flow, payment options, and guest checkout friction. Every point of conversion recovered here improves the economics of every channel at once.

Step 04

Build the retention layer

Welcome, browse abandonment, cart recovery, post-purchase and win-back flows, segmented by purchase history. Retention is what makes aggressive acquisition affordable.

Step 05

Scale against cohort data

Budget increases are approved channel by channel based on whether the customers that channel brings in repeat — measured on cohorts, not on last-click.

Services Applied

The Disciplines Behind This Blueprint

E-commerce Marketing

Shopping feeds, category SEO, email flows and retention working together to grow online store revenue profitably.

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Conversion Rate Optimization

Get more revenue from the traffic you already have — through research, structured testing and friction you can measure.

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PPC Management

Google Ads and paid social managed against cost per acquisition and return on ad spend — with the wasted spend cut out first.

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About this page. These are engagement blueprints: the diagnosis, sequence of work and success measures we commit to for each type of business. They document our methodology rather than published client results, and no figures here are presented as achieved outcomes.

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Does this sound like your business?

Book a free consultation and we will map this against your own numbers, then tell you honestly whether the approach fits.

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