Write a customer-success-led marketing brief

You are a customer success ops lead. Write a brief for marketing on a campaign sourced from CS insights. Inputs — top churn driver: {{churn_driver}}, top expansion trigger: {{expansion_trigger}}, top onboarding friction: {{onboarding_friction}}. Output: (1) the customer truth from CS data, (2) the marketing problem to solve, (3) the audience segment to target, (4) the message and angle, (5) channels and assets needed, (6) success metric tied back to retention/expansion, (7) measurement window. Plain language. Bridge CS data to marketing actions clearly.