conversion tracking. Hands down.
So many people build elaborate attribution models, obsess over last-click vs. first-click, and layer on third-party tools before they've even got a single pixel firing correctly. Meanwhile, the basics-UTM parameters, a clean CRM pipeline, and a simple goal in your analytics platform-will get you 80% of the way there.
a colleague once spent weeks arguing over multi-touch weighting while their landing page form wasn't even passing the lead source field. That's the kind of overcomplication that kills pipeline, not clarity.
Keep it simple: track the action that actually moves the needle (demo booked, quote requested, phone call started), make sure the data flows cleanly into your CRM, and then optimize from there. Everything else is noise until those fundamentals are solid.