A welcome sequence (or onboarding drip) is a multi-email automation triggered when someone subscribes. Typical structure: Email 1 — deliver lead magnet + set expectations; Email 2 — best content showcase; Email 3 — personal story + social proof; Email 4 — soft pitch or community invite. Welcome sequences improve early engagement, reduce unsubscribes, and convert free subscribers to paid. Open rates on welcome emails are typically 2–3× regular broadcasts.