Day 21-30: Level up their usage

For users who are engaged, show them advanced capabilities:

• Advanced features - Premium or complex functionality
• Best practices - How power users get maximum value
• Community invitation - Join other successful users
• Feedback request - What would make this better for you?

Segment this email: only send to active users. Inactive users should receive re-engagement content instead.

End of onboarding is not the end of communication. Transition to regular value-add content and product updates.