Half the marketing accounts I audit are optimising against numbers that are quietly wrong: GA4 half-configured, conversions double-counted or never firing, consent settings silently discarding a third of the data. Every decision built on that is a guess wearing a spreadsheet. Fixing measurement is the least glamorous work in marketing and the highest-leverage, because it makes every other channel smarter.
Then there is the multiplier nobody budgets for: conversion rate. Doubling traffic is expensive. Taking a page from converting two visitors in a hundred to three costs a fraction of that and raises the return on every channel at once, permanently.
What the work covers
GA4 configured properly, with named conversion events that map to things your business actually cares about. Google Tag Manager built with a naming convention your next hire can read. Conversion tracking verified end to end, including calls and WhatsApp clicks, the leads service businesses most often fail to count. Looker Studio dashboards that answer questions instead of decorating them. And CRO: research-led page changes, tested where traffic allows, judged on leads rather than opinions.
The standing rule
Tracking gets verified before campaigns spend and before redesigns launch, never after. Retrofitted measurement loses your baseline forever, and the baseline is the most valuable data you own.