Tie marketing to business outcomes by tracking the full path: from spend, to leads, to customers, to revenue. That means setting up conversion tracking properly and knowing what a customer is worth, so you can tell which channels actually pay off.
Measure over a sensible window, since some marketing (especially organic and brand) pays back slowly. Judging a long-term channel by one month understates it, while a quick-return channel can be assessed sooner. Match the measurement period to how the channel actually works.
Updated July 2026
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