This automation walks every customer who's opted in to receive email and, for anyone who doesn't already have a matching MailerLite contact, either links them to an existing MailerLite subscriber by email or creates a new one. It's a one-way, name-and-email-only sync into MailerLite — it doesn't add anyone to a specific MailerLite group, and it's a separate system from Sprwt's own Marketing Campaigns feature.