“Why don’t our tools agree?”
Ad platforms, web analytics and the CRM each count in their own way. I trace where the figures diverge and write down which one to use for which decision.
Areas of workI started in paid acquisition, moved to tracking, then to the pipelines and models underneath. Before building a model, I want to understand what people will use it for and what its numbers are supposed to mean.
I work mostly with marketing and data teams in e-commerce, on BigQuery, dbt, SQL and Python.

Ad platforms, web analytics and the CRM each count in their own way. I trace where the figures diverge and write down which one to use for which decision.
Areas of workAt lePERMISLIBRE, answering it meant defining acquisition, allocating spend, and keeping the cost of customer journeys separate from conversion attribution.
Read: An acquisition cost should be explainableConventions, business rules, runbooks and access, written while the platform is being built, so another person can understand, operate and change it.
Read: Build a data platform someone else can runStandardising Google Analytics and Google Tag Manager across 50 countries, 50 brands and thousands of websites.
Marketing data in a five-person data team: acquisition-cost modelling, attribution comparisons, and real-time pipelines routing advertising leads to call centres.
Data collection, ingestion, warehouse modelling and reporting for different clients, adapted to the people who will use and maintain each system.
Tell me the context and what you need to decide. A project, a technical question, or something you’d like to compare notes on are all fine.
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