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Case study

How this Amazon seller grew webshop revenue to €1.92M in just six months

E-commerceHealth & SupplementsGoogle AdsSocial AdsRemarketing
Amazon Seller

“SOLID developed the advertising strategy and managed all our Google and social media campaigns. Revenue from our own webshop increased by 102% and we achieved a stable 30% repeat purchase rate.”

GF

Founder & CEO

Leading health & supplement brand

102%

Revenue increase

119%

More conversions

30%

Repeat purchase rate

6 mo

Timeline

The client

Germany's leading health supplement brand on Amazon

With more than 42 products, this seller supplies thousands of customers across Germany and Austria every year. Founded as a one-person operation, the company has grown into a team of ten under the founder and CEO's leadership.

To diversify revenue and reduce dependency on Amazon — where unpredictable listing suspensions threatened stability — the company launched its own Shopify store. SOLID was brought in to develop an advertising strategy that would turn the webshop into a real revenue channel.

Industry

Health & supplements

Markets

Germany & Austria

Platform

Shopify

Amazon Seller case study cover image

Our approach

Two pillars, one growth system

We structured the engagement around two parallel workstreams: building a precision Google Shopping architecture that could stay profitable on thin margins, and layering in full-funnel remarketing to maximize customer lifetime value.

Pillar 1

Precision Google Shopping architecture

  • Single Product Ad Groups for granular bid and keyword control
  • Brand and product-specific search campaigns by intent level
  • Separate campaigns with dedicated budgets for top-selling products
  • Strict ACoS target of 25% to protect thin margins

Pillar 2

Full-funnel retargeting and acquisition

  • Dynamic remarketing on Facebook and Google for cart abandoners
  • Personalized ads based on visitor behavior and products viewed
  • Coordinated video campaigns on Facebook and Instagram for new audiences
  • Lifecycle email strategy to drive repeat purchases over time

The full story

From Amazon-dependent to a €1.92M webshop in six months

The starting point: a dominant Amazon brand with an underperforming webshop

This seller had built one of Germany's leading health and supplement brands on Amazon — over 42 products, thousands of customers across Germany and Austria, and millions in annual revenue. What started as a one-person operation had grown into a team of ten.

But the company's own Shopify store was barely contributing. Previous attempts to run ads in-house had produced unstable results, with webshop revenue accounting for less than 3% of total sales. Meanwhile, Amazon's unpredictable listing suspensions made diversifying sales channels an urgent priority.

Why self-managed campaigns weren't working

The health and supplement space is fiercely competitive. Margins on individual products are tight — the company's philosophy is premium quality at accessible prices. That meant every ad euro had to work harder than in most e-commerce categories.

Without a structured campaign architecture, budgets were spread too thin across too many products with no way to control bids at the individual SKU level. The result: inconsistent revenue, wasted spend, and no clear path to profitability in paid acquisition.

Building a Shopping architecture designed for thin margins

We restructured the entire Google Ads account using a Single Product Ad Group methodology. Instead of lumping dozens of supplements into broad campaigns, every product got its own ad group with dedicated search terms and bid adjustments.

For the highest-performing products, we went further — spinning them out into separate campaigns with their own budgets. This let us scale winners aggressively while keeping underperformers from draining the account. Every campaign was built around the 25% ACoS ceiling the business needed to stay profitable.

Bringing back visitors who didn't buy the first time

Health supplement purchases are considered decisions. Customers research, compare, and often leave without buying on the first visit. We built dynamic remarketing campaigns on both Facebook and Google that served personalized ads featuring the exact products each visitor had viewed.

Cart abandoners saw different creative than casual browsers. Someone who spent time on a product page but did not add to cart received educational content about the product’s benefits. This layered approach turned one-time visitors into customers — and customers into repeat buyers.

Solving the repeat purchase problem

One of the founder's biggest concerns was that customers would order once and never return. Supplements are inherently a repeat-purchase category, but only if you stay in front of customers at the right time.

We built coordinated remarketing sequences that re-engaged customers weeks and months after their first purchase — timed to when their supply would be running low. Combined with the dynamic ad campaigns, this drove the webshop to a consistent 30% repeat purchase rate, with customers averaging 2–3 products per order.

Results

What changed after six months

The webshop went from contributing less than 3% of total revenue to becoming a significant, reliable sales channel — and a hedge against Amazon's volatility.

Webshop revenue increased 102% in six months

The company’s own online store went from a negligible revenue source to a significant, reliable sales channel — reducing dangerous dependency on a single marketplace.

Order volume grew 119% while maintaining profitability

More than double the conversions, with customers averaging 2–3 products per order. SOLID hit the target cost per acquisition while scaling spend consistently.

30% of customers came back for repeat purchases

Lifecycle remarketing turned one-time buyers into recurring customers, building a predictable revenue stream the business could plan around.

How we did it

The tactics behind the results

Every tactic was chosen to solve a specific constraint: thin margins, competitive keywords, and customers who needed multiple touchpoints before converting.

  • Optimized Google Shopping campaigns
  • Single Product Ad Groups methodology
  • Brand and product-specific Google search and Shopping campaigns
  • Separate Google Shopping campaigns for top-selling products
  • Video campaigns on Facebook and Instagram
  • Dynamic remarketing on Facebook and Google

How we work

What made this engagement different

When margins are thin, the difference between profitable and unprofitable comes down to discipline in the details.

The SOLID approach
Other agencies
Single Product Ad Groups with individual bid control per SKU
Broad campaigns grouping dozens of products together
Separate campaigns with dedicated budgets for top sellers
One budget shared across all products regardless of performance
25% ACoS ceiling built into every campaign decision
Optimize for volume first, worry about margins later
Dynamic remarketing segmented by visitor behavior
Generic retargeting showing the same ad to all visitors
Timed re-engagement campaigns for repeat purchases
No post-purchase strategy beyond a thank-you email
Google Partner
Klaviyo Partner
Shopify Partners
Meta Business Partner
WooCommerce
HubSpot Inbound Marketing Certified
Gorgias Partner

Client feedback

What our clients say

Torsten Müller logo

“SOLID more than doubled our conversion rate.”

We hired SOLID for a large CRM project. I was looking for support with reacquisition and reactivation campaigns, automations, and a revamp of our newsletters. SOLID overachieved their goals, and more than doubled our projected conversion rate.

Torsten Müller

Torsten Müller

VP of Growth

Victor Borsche logo

“A year of steady profitable growth!”

SOLID transformed our advertising strategy across 6 European markets. Their expert management of search, shopping, and social ads resulted in a remarkable tenfold increase in turnover and a consistently profitable ROAS.

Victor Borsche

Victor Borsche

CEO & Founder, OneEarPod

Annie Sands logo

“My numbers have increased steadily and profitably.”

I never would have imagined that we could achieve so much, so quickly. They put so much effort into helping us grow and answering our questions. My numbers have increased steadily and profitably under their management.

Annie Sands

Annie Sands

CEO & Founder, Sugarbabies

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