Redbrain & Secret Sales: The Secret to Incremental Marketplace Growth
Secret Sales, the UK’s largest off-price market place for Fashion, Footwear, Beauty and Accessories, partnered with Redbrain to grow incremental sales via Google Comparison Shopping Services (CSS).
Key Takeaways
The Highlights.
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The Background
Secret Sales is on a mission to transform the antiquated off-price industry into a profitable, on-brand component of online D2C strategies for brands. The brand uses Google Shopping for New Customer acquisition, which, with over £1 billion of inventory and 500,000 products onsite, provides a strong opportunity for a Google-first approach to their marketing activity. Secret Sales was looking for a partner in the CSS space that could help implement its ‘breadth not depth’ strategy.
The Challenge
Like many e-commerce retailers, Secret Sales faced increasing cost-per-click inflation and diminishing returns on existing Google Ads campaigns. To drive incremental sales at scale without cannibalising their existing internal campaigns, Secret Sales turned to Redbrain.
The Approach
Building for incremental growth
Complementing internal campaigns, never competing
Feed first, always
Optimised product data powered visibility
Targeting that moves fast
Seasonal and demand-led pushes reached high-intent shoppers ready to buy
Collaboration that counts
Open data-sharing and full transparency delivered measurable ROAS.
Performance that can be proven
Every result validated through ROAS testing.
Redbrain focused on driving complementary, scalable growth that would be incremental to the retailer’s ongoing internal activity, without driving costs up. This strategy started to bear fruit quickly, with the team using their expertise to deliver highly converting traffic. Starting with feed optimisation, Redbrain and Secret Sales ensured that the marketplace’s product feed was as optimised as possible, showcasing the brand’s vast product range. With targeted pushes based on seasonality and customer demand, Redbrain honed in on high-intent new customers looking for Secret Sales products.
Key to the partnership's success was the collaborative and transparent approach that both teams committed to from the outset. Secret Sales shared insights from their internal activity, promotions, and strong performers, working directly with Redbrain’s Account Management and PPC Traffic teams to unlock further growth between the two companies. At each stage, Redbrain was transparent about performance to validate Return on Ad Spend (ROAS).
The Results
A partnership for impact
+215%
Sales volume
5-10%
New acquisition weekly growth
+46%
Click to sale conversion
Following this approach, an impactful partnership for growth has been established, with minimal impact on internal campaigns. This successful collaboration has positioned Redbrain as a trusted growth partner, achieving significant results for Secret Sales:
- Sales volume has more than doubled (an increase of 215%) year-on-year from 2023-2024
- Conversion from click to sale increased by 46% from 2024 to 2025, demonstrating a commitment to delivering high-intent customers ready to purchase
- Redbrain’s CPA model has also been particularly helpful. The CSS premium partner unlocks an additional 5-10% growth weekly for new acquisitions on a controlled ROAS model
Testimonials
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Actionable recommendations
About the Author
Senior Key Account Manager with a focus on building strategic partnerships with leading retail clients. Specialises in Google Shopping and Microsoft Shopping Ads, with a strong focus in driving performance through data-led insights and tailored strategies. Dedicated to enhancing the customer experience and committed to nurturing long-term, impactful relationships that deliver mutual growth.
