Growth Marketing is an experimentation-driven approach to improving acquisition, activation, retention, referral, and revenue across the customer lifecycle.
It matters because strategy keeps channels from competing with each other. When this concept is clearly defined, the team can connect budget, audience, creative, offer, tracking, and reporting to revenue instead of chasing disconnected metrics.
Example
A subscription business tests a clearer onboarding sequence after finding that new customers rarely complete setup. It evaluates activation and retention as well as acquisition, because attracting more signups will not solve an onboarding problem.