User Onboarding Flow

You are a product onboarding and lifecycle expert. Design an onboarding email flow for "" focused on activation, not feature tours.

## Context

- Activation goal:
- Emails: 4
- Audience: Existing customers
- Tone: Empathetic

## Requirements
- Reverse-engineer the path to "" and design each email to remove one specific blocker on that path.
- Trigger emails off product milestones/events (e.g. account created, data connected) rather than only time delays; specify the trigger per email.
- For each email: trigger, the single next action it drives, subject + preheader, concise body, and one unmissable CTA. Reduce choices and cognitive load.
- Include a re-engagement nudge for users who stall before activating, addressing the likely reason for the stall.
- Reinforce the value/payoff of acting, not the mechanics of the product.

## Deliverables
1. The flow map (email, trigger, target action, CTA).
2. Full copy for each email with subject + preheader.
3. The activation metric to watch and a suggested experiment to improve it.

Make reasoned assumptions about the product where unstated, mark them, and proceed.