Marketing Analytics
One customer sees an ad in search, then on social, then arrives via email and buys. Who "brought" the sale? The answer is not obvious, and attribution is what formalizes it — a rule that distributes credit across touchpoints. That rule decides which channel the team deems effective and where it shifts the money.
The topic is failed on two conflations: mixing up the model (how credit is split) with the window (over what time span it counts), and treating the model choice as report cosmetics. In fact the model directly moves the budget. The map below untangles the three questions.
Topic map
- Attribution model — the rule for distributing credit across touchpoints and the model families from last-click to data-driven.
- Attribution window — how long after a touch a conversion is still credited to a channel, and how to choose its length.
- Business impact — how the model choice changes the budget, the ROI assessment, and which channels get scaled.
Common traps
| Mistake | Consequence |
|---|---|
| Confusing the attribution model with the attribution window | Conflates "how credit is split" and "over what span" |
| Naming only last-click, forgetting multi-touch models | The top of the funnel is left with no credit |
| Treating the model choice as report cosmetics | Misses that the model moves the budget and the ROI view |
| Defaulting fintech to last-click despite a long funnel | Awareness channels that really drove the purchase are starved |
| Using a fixed window like 7 days for any product | An expensive, long-cycle product loses its early touches |
| Confusing credit redistribution with changing the conversion count | The model neither creates nor removes conversions, only splits them |
Interview relevance
Attribution is asked to check whether the candidate understands that money sits behind a pretty report. A strong answer separates the model from the window and explains why the model choice is a budget decision, not a matter of "showing it more nicely".
Typical checks:
- What an attribution model is and which families exist.
- How the attribution window differs from the model and how its length is chosen.
- How the model choice redistributes credit and moves the budget.
- Why last-click is bad for a long-funnel product.
Common wrong answer: "attribution is a per-channel spend dashboard". Attribution is not about how much you spent, but about which touch a conversion is credited to — and that is what decides which channel to scale.