Route your tracking through a server you control instead of the browser - recovering signal that ad-blockers and cookie limits strip out, and keeping order and customer data clean on the way to the platforms.
Client-side sends data straight from the browser (where blockers thin it out). Server-side sends it to a container you own first - which forwards clean, complete data on to each platform.
Ad-blockers, ITP and the end of third-party cookies all chip away at browser-based tracking - in some markets over 40% of sessions never make it back. Server-side moves collection to a first-party container you control, so cookies last longer, blockers can't tell what's what, and the Conversions APIs (Meta CAPI, Google Enhanced Conversions) get the durable signal they're built for.
It also gives you a place to enrich, hash and redact data before it leaves your environment - which for regulated sectors isn't a nice-to-have.
A messy client-side container makes a messy server-side one. We clean it first, then measure the signal you're actually losing.
Stand up the server container, first-party subdomain and Consent Mode, and migrate one platform at a time - GA4, then CAPI, then Enhanced Conversions.
Run client and server side by side until they agree within tolerance, then switch over. We prove the recovery, we don't just claim it.
Server-side isn't for everyone. Below roughly £20-30k/month in media the engineering rarely pays back inside a year. Above £100k/month, in regulated sectors, or wherever you've got measurable signal loss, it usually earns its keep. We'll tell you which side of the line you're on before you spend a penny.