Once connected, Kalumma and Mailchimp keep contact and audience data in step. New or updated contacts flow between the systems based on the sync preferences you set, so a change in one place is reflected in the other without manual list management. You choose which audiences participate and whether sync runs one-way or two-way per audience. Teams that want more control can use the connection to segment contacts or trigger follow-up based on Kalumma data. Configuration is handled through a guided setup with documentation, so you can connect audiences, map fields, and set sync preferences without writing code.