Use MailChimp for sending large mailing campaigns and building landing pages.
Setup
Prior to using the MailChimp integration, the API link must be set up.

This requires a number of keys and IDs. You can find these in your MailChimp Account info.
(To do this, click on your Account logo, bottom left corner of MailChimp or MailChimp API Keys)
- API Key
Via API Key generation - MailChimp Domain
the number-letter combination at the end, after the "-" - List ID
In the specific audience, go to Settings / Audience Name / Audience ID
Use
In the Admin - Member Overview, you can sync contacts with MailChimp using the button.

And after the Sync, you get to see the result.
So the sync is going to add new members and remove deleted members (in Klubs) also in MailChimp.

