Corston

How Corston Cracked the Code to Full-Funnel Google Growth

+23

%

Google revenue

+15

%

ROAS across all Google channels

Corston Architectural Detail is a premium hardware, lights, switches and sockets brand known for its high-quality, design-led fittings for the home.

The Challenge

Corston were looking to scale their high-performing Google advertising further, but struggled to justify upper-funnel investment due to limited visibility into its true impact.

The Solution

In September 2024, Corston launched Google Demand Gen campaigns to complement its performance mix and drive discovery among new audiences.

To track results, the team used Fospha’s full-funnel measurement platform, which revealed how these campaigns impacted not just direct returns—but also boosted performance across other Google campaign types.

"Fospha has been such a game-changer for our team. The data allowed us to quantify the impact of every channel across our Google strategy and gave us the confidence to invest in our upper-funnel."

Josie Collins

Marketing Manager

#1

most efficient Google channel

51

%

higher ROAS than paid media target

The Results

It quickly became Corston's most efficient Google channel, outperforming ROAS targets by 51%.
Performance Max ROAS improved by 25%, demonstrating how upper-funnel activity can enhance efficiency across conversion-focused campaigns.
Overall Google ROAS improved by 15%, even as spend increased, validating the power of a full-funnel strategy.

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