Pillar 1
Precision paid search at scale
- Segmented campaigns by product and intent level
- Optimized shopping feeds to match real search behavior
- Phased budget increases tied to strict ROAS gates
- Weekly negative keyword refinement to cut waste
Case study · OneEarPod
How we 10x'd revenue for an AirPod replacement brand in six months
E-commerceD2CGoogle AdsSocial AdsCross-border
“Our turnover has increased tenfold and we have had a profitable ROAS since the start. I can highly recommend SOLID Marketing.”
Victor Borsche
CEO & Founder, OneEarPod
10x
Revenue
6x
Ad spend scaled
1→7
EU markets
6 mo
Timeline
The client
A smarter way to replace lost AirPods
OneEarPod sells individual replacement AirPods — left, right, or charging case — so customers don't have to buy an entirely new set when one piece breaks or goes missing. It's a simple idea that saves money and reduces electronic waste, backed by fast shipping that customers love.
When they came to us, the product was profitable and the brand had a loyal base in Germany. But their paid campaigns had hit a wall — Google wasn't spending their daily budget, and every attempt to scale made returns worse.
Industry
Consumer electronics
Markets
7 EU countries
Our approach
Two pillars, one growth system
We structured the engagement around two parallel workstreams: making the existing German campaigns as efficient as possible, then replicating that playbook across new European markets.
Pillar 2
Cross-border growth with native teams
- Native-speaker account managers for each market
- Localized ad copy, not just translated
- Market-specific bidding strategies
- Funnel-specific retargeting on Meta
The full story
How we took OneEarPod from one market to seven — while improving profitability
The starting point: a profitable product stuck at a ceiling
OneEarPod sells individual replacement AirPods — a simple, clever idea that saves customers money and reduces e-waste. Fast shipping and genuine quality had built them a loyal customer base in Germany.
But their paid ads had plateaued. Despite a healthy ROAS, Google wasn't spending their daily budget. Every attempt to scale led to worse returns. They came to us with a clear constraint: grow the budget only if ROAS stays above target. No exceptions.
Why the ads weren't scaling — and what we changed
The core issue was structure. OneEarPod was running broad campaigns that mixed different products, intents, and match types together. Google's algorithm had no room to optimize because everything was competing for the same budget.
We rebuilt the account from scratch. Each product got its own Search and Shopping campaign with dedicated budgets and bidding strategies. We restructured the product feed so titles and descriptions matched how people actually search — "replacement left AirPod Pro" instead of generic SKU names.
Filtering out millions of irrelevant searches
"AirPods" gets millions of searches every day — reviews, comparisons, setup guides, troubleshooting. Almost none of those people want to buy a single replacement earbud. Without aggressive filtering, OneEarPod’s budget would evaporate on clicks that never convert.
We built a negative keyword strategy that we refined weekly. Every search term report was reviewed, irrelevant queries were excluded, and the remaining budget went exclusively to high buyer-intent searches. This wasn’t a one-time setup — it was an ongoing discipline that compounded over time.
Scaling into six new countries with native speakers
Once the German campaigns were consistently profitable and exceeding ROAS targets, we expanded. Austria came first — similar language, but different search patterns and competition. Then France, Netherlands, Belgium, Italy, and Spain.
Each market got a native-language account manager who didn't just translate ads — they adapted messaging, landing pages, and bidding strategies for how people in that specific country search for and buy replacement AirPods. A French customer doesn't search the same way a Dutch customer does, and our campaigns reflected that.
Re-engaging visitors who didn't buy the first time
We layered in retargeting campaigns on Facebook and Instagram, segmented by where each visitor dropped off. Someone who viewed a product page saw different creative than someone who added to cart but didn't check out. This kept OneEarPod visible across the entire buying journey and brought back visitors who were already interested but needed another touchpoint.
Results
What changed after six months
OneEarPod came to us with campaigns that had stopped growing. Here's where things stood half a year later.
Ad spend went from stuck to 6x — while ROAS improved
We doubled the budget in month one, then kept scaling. By month six, ad spend was 6x the starting point and ROAS was higher than when we began.
OneEarPod went from niche seller to visible competitor
Impression share and click share both climbed steadily. In key markets, OneEarPod moved from barely appearing to consistently winning auctions against larger brands.
Six new countries launched profitably in year one
Each market had native-language campaigns, localized messaging, and its own ROAS targets. All seven markets were profitable by the end of the first year.
How we work
What made this engagement different
Most of what we did isn't exotic — it's the discipline and specificity that matters.
The SOLID approach
Other agencies
Cross-border
Seven markets, seven native strategies
Each market got its own localized campaigns — not just translated ads, but culturally adapted messaging, bidding strategies, and creative tailored to local buying behavior.
GermanyAustriaFranceNetherlandsBelgiumItalySpain
Client feedback
What our clients say
“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
VP of Growth
“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
CEO & Founder, OneEarPod
“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
CEO & Founder, Sugarbabies
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