How Data Insights Transform Marketing

Most marketing teams are not short of data. They are short of decisions that would change if the data said something else, which is a different problem and a much harder one to admit to.
The useful question is not "what are we measuring" but "what would we do differently on Monday if this number moved twenty per cent". Anything that does not survive that question is a dashboard, not an insight.

Pick one number per campaign and defend it
A campaign optimised for four metrics is optimised for none. Choosing one — and writing down what you expect it to do before launch — is what separates a test from a retrospective.
The other numbers still get watched. They are guardrails, not targets, and the distinction matters when the results come in ambiguous.
Attribution is a model, not a measurement
Last-click, first-click and every position-based variant are all opinions about how credit should be shared. None of them is the truth, and treating any of them as the truth will systematically starve the channels that do the early work.
Run at least two models side by side. Where they disagree is where the interesting spending decisions are.
Segment before you average
An average conversion rate across every audience, device and intent is the number least likely to describe anybody. It is also the number most likely to be presented.
The moment a metric is split by acquisition source or by device, the flat line usually turns out to be two lines going in opposite directions — and only one of them needs attention.
Close the loop, or stop collecting
Data that never reaches a decision is a maintenance cost with a compliance risk attached. Every event in the tracking plan should have a name, an owner and a sentence explaining what it changes.
Anything without all three can be switched off, and the reporting gets faster and more honest for it.
