We initiated the activities in January and continued them throughout the first quarter, which still included a period of high purchasing activity in the industry. The key challenge was to fully leverage the sustained demand and translate it into scalable campaign performance. The business objective was not only to maintain growth momentum, but above all to effectively increase sales in an environment of strong competition and high shopping traffic intensity.
Rather than dispersing the budget, we implemented a precise capital allocation strategy. Resources were concentrated on the product assortment with the highest sales potential, enabling us to maximize return on investment. Performance control eliminated the risk of inefficient budget spend.
Scaling sponsored listings sales for a specialized e-commerce in the ventilation systems and air quality sector.
Filtry Aero is a Polish family-owned brand specializing in filters for recuperators, air purifiers, and ventilation systems.
The company started its own filter production in 2012, and a year later launched the FiltryAero.pl store. Today, it offers both original filters and its own replacements tailored to many device models, expanding sales through its own e-commerce and Allegro.
Filtry Aero in brief
In a category based on product compatibility with specific devices, listing visibility and precise budget management in Allegro Ads directly impact sales scale.
Filtry Aero operates in a category where Allegro users often search for very specific products: filters tailored to a particular recuperator or air purifier model.
In such an environment, it is crucial to identify listings that have real scaling potential and limit spending on products that do not translate into proportional sales growth.
The goal of the collaboration was to increase the number of products sold and the sales value generated by Allegro Ads without compromising campaign efficiency.
We compared results between January–March 2026 and the previous quarter: October–December 2025.
Number of products sold: +67%
Sales value: +84%
ROAS: maintained at a stable level
The key outcome was not just sales growth. It was achieved while maintaining stable campaign efficiency, despite increasing the scale of advertising activities.
1. Demand and listing potential analysis
The first step was to analyze sales performance, interest in individual products, and the effectiveness of sponsored listings.
This allowed us to identify products with the highest growth potential: those in demand, with strong conversion rates, and capable of absorbing higher budgets without a rapid decline in performance.
2. Selective budget management
We did not treat the entire catalog equally.
The budget was concentrated on listings with the highest sales potential. Products that did not deliver proportional returns were limited or further optimized.
As a result, advertising spend was allocated where it could realistically drive sales growth, instead of being spread across the entire assortment.
3. Continuous bid and campaign optimization
Campaigns were managed continuously, with ongoing performance analysis and responsiveness to changes in demand and listing efficiency.
We regularly updated bids and budget allocation across products. This allowed us to scale where advertising generated sales and reduce spend where efficiency declined.
In Allegro Ads, increasing spend is easy. Increasing sales in a way that remains profitable is much harder.
In the Filtry Aero project, we did not scale campaigns broadly and without selection. We focused on listings with the highest potential to turn additional budget into real sales.
Result: within three months, the number of products sold increased by 67%, and sales value by 84%, while maintaining a stable ROAS.
We will identify which listings have scaling potential, where your budget is underperforming, and how to use Allegro Ads as a real driver of sales growth.
Let’s talk about Allegro Ads!
