Essays, teardowns and field notes on treating marketing like engineering — AI, performance marketing, Google Ads, tracking and SEO/GEO. Written in the open by the founder of outfight.https://marketingengineer.nl/enhttps://marketingengineer.nl/writing/server-side-tagging-what-actually-worked/https://marketingengineer.nl/writing/server-side-tagging-what-actually-worked/We moved tracking off the browser and into a first-party server container. Here is the setup, the numbers before and after, and the two mistakes that cost us a week.Thu, 28 May 2026 00:00:00 GMThttps://marketingengineer.nl/writing/geo-how-ai-answers-pick-their-sources/https://marketingengineer.nl/writing/geo-how-ai-answers-pick-their-sources/Generative engines don’t rank pages, they cite passages. Notes from three months of testing what gets a brand quoted by ChatGPT, Perplexity and AI Overviews.Thu, 16 Apr 2026 00:00:00 GMThttps://marketingengineer.nl/writing/smart-bidding-is-only-as-smart-as-its-inputs/https://marketingengineer.nl/writing/smart-bidding-is-only-as-smart-as-its-inputs/Stop tweaking tROAS targets and start auditing what the algorithm eats. A field note on value rules, conversion quality and the inputs nobody checks.Mon, 09 Mar 2026 00:00:00 GMT