Relevant Digital has published new findings from a Prebid performance study, analysing server-side, client-side and parallel bidding setups across real publisher environments. The results highlight apparent performance differences among the three implementations and show how strategic testing can translate them into measurable gains for publishers.

The study found that parallel bidding generated the most substantial overall revenue, while server-side improved speed, load times and viewability thanks to reduced browser workload. Client-side bidding remained competitive, particularly in eCPM performance, benefiting from richer browser-level signals.

"There is no universal setup that works for every publisher," said Petri Kokkonen, CEO at Relevant Digital. "Performance depends heavily on each environment, configuration and SSP partner behaviour. The key is testing, experimenting, measuring and adapting based on real results."

Another major takeaway: different SSP partners performed differently depending on whether they used client-side or server-side bidding. This reinforces the value of hybrid parallel setups, where server-side is selectively enabled for SSPs that benefit most. 

In the long term, building a culture of testing enables publishers to make data-driven decisions, deepen their understanding of the monetisation environment, and improve yield without unnecessary complexity.

The full article is available here:

Prebid Testing: How Server-Side, Client-Side, and Parallel Bidding Compare

For more information, please contact:
Petri Kokkonen, CEO
petri.kokkonen@relevant-digital.com

Relevant Digital

Relevant Digital empowers digital publishers and ad sales teams to take complete control of their ad inventory monetisation across web and mobile platforms. Our flagship product, Relevant Yield, is a modular SaaS platform with tools for ad revenue re...

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