Filling Pieces increased their Meta ROAS by 172.62% in just four weeks despite the degradation of third-party cookies.

How did they do it?

The Challenge

Filling Pieces faced challenges in maintaining accurate user tracking and understanding customer journeys with third-party cookies becoming less reliable.

This shift disrupted their ability to make data-driven decisions, particularly in ad targeting and personalization.

Global privacy compliance is critical for Filling Pieces, as they prioritize trust and transparency with their customers.

For this reason, they needed to ensure any data tracking methods they implemented were responsible and aligned with their focus on user privacy.

Another consideration they had when selecting a new tracking solution was that it must seamlessly integrate with their existing eCommerce platform — Shopify — and their other marketing tools without excessive customization.

They needed a tracking solution that was plug-and-play after implementation.

The Solution

Filling Pieces sought help from Ask Phill, a leading eCommerce agency in Europe for fashion and lifestyle brands, and an Elevar partner.

Ask Phill advised Filling Pieces to implement a tool to collect and monitor first-party data. The tool? Elevar.

With help from Ask Phill, Filling Pieces first implemented Elevar server-side tracking in May 2024.

“The main challenge we faced was configuring Elevar to align with our specific tracking needs without having all the technical knowledge in-house, but with the support of Ask Phil, we were able to overcome these initial hurdles and create a smooth, reliable integration.” – Jeroen Overweg, eCommerce & Marketing Manager at Filling Pieces

Elevar’s precise data collection capabilities allow Filling Pieces to track user behavior with first-party data, providing granular insights into user behaviors.

Additionally, Elevar’s responsible approach to collecting and transmitting data helps Filling Pieces comply with global privacy regulations.

Results

Within just four weeks after implementing Elevar, Filling Pieces saw significant improvement in the performance of their Meta ad campaigns, including:

• 172.62% increase in ROAS.
• 234.64% higher conversion value.
• 278.14% increase in purchases.
• 67.54% decrease in CPA.

And it didn’t stop there! Filling Pieces implemented Elevar’s server-side integration for Klaviyo in October 2024. Since then, they’ve seen a growth of 80% in attributed revenue mainly because flows are performing better.

With Elevar’s accurate tracking and real-time reporting, Filling Pieces was able to identify which channels drive the most value, and optimized their ad spend accordingly.

“This level of data precision has helped us allocate budget more efficiently, focusing on channels that yield the highest ROI. Additionally, Elevar’s insights have informed our channel strategy by highlighting effective customer touchpoints, allowing us to prioritize efforts in channels that engage our audience most effectively.” – Jeroen

Filling Pieces has advice for other eCommerce brands who want to improve their tracking: Prioritize solutions that offer accurate, first-party data collection and ensure they’re compliant with data privacy standards from the start.

“With the landscape shifting away from third-party cookies, investing in reliable, privacy-focused tracking like Elevar allows you to future-proof your strategy, build customer trust, and maintain critical insights for optimization and personalization.” – Jeroen

Ready to Replicate Filling Pieces’ Success For Your Brand?

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