Spent years understanding how ad tech actually works – not from documentation, but from debugging broken tracking setups, investigating auction anomalies, and reverse-
engineering network behavior.

Got into ad tech through troubleshooting – fixing things that “should have worked but
didn’t.” Over time, that turned into a deep understanding of how tracking, attribution, and
auctions behave under real conditions, not ideal ones.

John enjoys explaining complex systems in plain language. He doesn’t talk down to readers
– assumes they’re smart, just missing context. Often breaks down edge cases most guides ignore.

Link to Fiverr: https://www.fiverr.com/john_perish

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