When this e-commerce brand approached us, they were in a tough spot. They had attempted to run Google Ads on their own, but after just two days and a €250 budget gone with no meaningful results, they knew something had to change. That’s when they reached out to us at P-Scale.
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Our mission?
Build a lean, scalable paid acquisition engine from scratch that could work even on a shoestring budget.

This case study breaks down exactly how we turned a struggling ad account into a high-performing system that delivered a whopping 1556% Return on Ad Spend (ROAS) with just €15 per day.
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Challenge: Low Budget, High Competition

The client came to us with three core challenges:

1. Daily Budget of Just €15 – We needed to be incredibly precise and efficient with ad spend.
2. High Product Variety – Dozens of SKUs meant we couldn’t just push one hero product; we had to build a strategy that worked across the board.
3. Highly Competitive Market – The niche was saturated with big players, meaning CPCs were high and attention was hard to win.

Are you wondering how to advertise online with a small budget? Or why your Shopify ads aren’t converting despite great products? These are the exact problems we solved.

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Step 1: Rebuilding the Foundation

Before we spent a single euro on ads, we overhauled the setup. Here's what we focused on:

• Conversion Tracking: Ensured proper e-commerce tracking via Google Analytics and Google Ads. Clean data is non-negotiable.
• Feed Optimization: Cleaned and structured the product feed, ensuring titles, descriptions, and categories were aligned with high-intent search terms.
• Campaign Structure: We used a granular segmentation model to create campaigns focused on specific product categories, not a blanket strategy.

Still asking, "Why am I getting traffic but no sales?" Often, it comes down to this foundation. Without tracking and structure, you’re flying blind.

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Step 2: Building a Lean Google Ads Engine

With tracking fixed and the feed optimized, we launched tightly-controlled Shopping campaigns with laser focus.

• Smart Budget Allocation: Even with a €15/day budget, we split spend intelligently across best-sellers and experimental products.
• Segmentation by Intent: Instead of generic campaigns, we segmented products based on buyer intent and past performance.
• Manual Bidding: We avoided Smart Bidding in the beginning due to the limited data pool and opted for controlled manual CPC bidding to ensure efficiency.

Searching for "how to scale Google Shopping ads" or "best Google Ads strategy for small shops"? This is the exact framework that works.

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Step 3: Testing, Learning, Scaling

The first 30 days were all about testing and collecting data.

• 20 Conversions at €22.51/pc: This was the early indicator that the system was working. Compared to the zero conversions during their initial €250 self-run attempt, this was a massive step forward.
• CTR of 1.85%: Our ad copy and product feed optimizations were clearly resonating.

Looking to improve your click-through rate? Want lower cost per acquisition? These numbers weren’t magic – they were built with purpose.

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Step 4: Dashboard and Data Visibility

We set up a customized reporting dashboard for the client to:

• View key metrics at a glance (impressions, conversions, spend, ROAS)
• Understand product-level performance
• See real-time progress without getting lost in platform complexity

Wondering how to track performance in e-commerce ads without spending hours in Google Ads Manager? Our dashboard gave instant clarity.

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Results After 90 Days

The outcomes speak for themselves:

• Impressions: Over 240,000
• Total Conversions: 140 purchases
• Click-Through Rate: 1.85%
• ROAS: 1556%

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Ask yourself: What would a 15x return on ad spend mean for your shop?

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Key Takeaways for E-Commerce Brands

1. You Don’t Need a Huge Budget to Get Results: Smart strategy and precise execution can beat big spenders.
2. Clean Tracking = Better Decisions: You can’t improve what you can’t measure.
3. Structure Beats Luck: A well-organized campaign setup always wins over random ad testing.
4. Lean Doesn't Mean Limiting: Even with €15/day, we built a machine that scaled smoothly over time.

Searching for "how to advertise on a tight budget" or "small business ad success stories"? This is living proof it works.

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What Made This Work?

• Clear Strategy: No random tactics. Everything tied back to clear KPIs.
• Hands-On Execution: We didn’t "set and forget." Daily management, weekly optimization.
• Tailored to the Client: We didn't just apply a template. We built a system around their products, goals, and limits.

Still asking, "Do Google Ads really work for small businesses?" Our answer: Absolutely – when done right.

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Looking Ahead: Scaling Beyond €15/Day

Now that the foundations are rock-solid, the client has the option to scale with confidence. Because the system is built on real data, reliable tracking, and structured testing, every increase in ad spend is now predictable and manageable.

We’re continuing to work closely with the client to:

• Expand into new product lines
• Introduce remarketing and branded search campaigns
• Gradually increase budgets with stable ROAS as the benchmark

Wondering how to scale your e-commerce store without losing profitability? This is the blueprint.

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Conclusion: The Power of Sustainable Performance Marketing

This case isn’t just about big numbers. It’s about what happens when small businesses are given the tools and expertise to succeed on their own terms.

With the right structure, even a €15/day ad budget can create life-changing results. If you’re an e-commerce founder tired of wasting budget or stuck with an agency that doesn’t get it, let this be a reminder:

Performance marketing should feel like momentum, not mystery.

Still searching for "best agency for Shopify ads" or "why isn’t my Google Ads campaign converting"? Let this be the proof that expert help can change everything.

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Want to build your own lean ad engine? This is exactly what we help founders and marketing teams do every day at P-Scale.