How data-driven attribution works
Fixed models apply the same rule to every conversion, last-click gives all credit to the final interaction, linear splits it evenly, and so on. Data-driven attribution instead compares the paths that converted with the paths that did not, and models how much each touchpoint actually contributed. Credit is then distributed by measured influence rather than position. Because it uses your own conversion patterns, it adapts to how your customers really behave, which usually reveals that assisting touchpoints deserve more credit than last-click allowed.
Why it beats last-click
Last-click systematically over-rewards the final touch, which is often branded search or retargeting, and starves the upper-funnel campaigns that created the demand. That distortion leads teams to defund exactly the prospecting that feeds the pipeline. Data-driven attribution corrects much of this by crediting the assisting interactions the customer actually passed through. When an account switches from last-click to DDA, budget priorities frequently shift, because the model finally values the touchpoints that were doing invisible work.
What DDA still cannot do
Data-driven attribution is better allocation, not proof of cause. It divides credit among the touchpoints in a converting path, but it cannot tell you whether the conversion would have happened without the ads at all. That question belongs to incrementality testing. DDA is also scoped to what a single platform can see, so it inherits the blind spots of that platform's tracking. It is the best default for dividing credit, and it should still be checked against blended measurement and lift tests.
How iClick uses data-driven attribution
iClick uses data-driven attribution as the default for in-platform credit, because it corrects the last-click bias that quietly defunds prospecting. It is treated as a better allocator, not the final word, and is read alongside blended MER and incrementality tests so the account is not steered by any single platform's self-report. When DDA reweights credit toward upper-funnel work, that is taken as a signal to protect demand creation, not as a guarantee those touchpoints were incremental.
