John Lewis Reduces Cost per Session by 32% With GA4 and Custom Bidding

Case Study

John Lewis Boosts Performance by Leveraging Event Signals and Real-Time Bidding

John Lewis partnered with TRKKN and MG OMD to unlock the power of their Google Analytics data. Together, they developed a custom bidding model in Display & Video 360 that identified high-value users based on the engagement likelihood. This tailored approach resulted in a 29% increase in session rate and a 32% decrease in cost per session, proving the value of combining first-party data with expert programmatic strategy.

29% uplift in session rate

32% less cost per session

Impact quantification via A/B campaign testing

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