A measurement plan comes before a single tag
The reason most analytics setups are a mess is that they were built tag-by-tag, reactively, with no plan — someone needed to track a button, so they added a tag, and repeat for three years. We start the other way around: with a measurement plan that says what this business needs to know and which events answer those questions. Then the GTM container and GA4 property are built to that plan, with consistent naming and a clean structure. It sounds basic, but it's the difference between an analytics setup that scales gracefully and one that has to be torn out and rebuilt in two years. Build the plan first and the implementation becomes straightforward — and trustworthy.