Introduction to Contact Groups

Contact Groups
Contact groups let you organize your contacts into segments based on specific attributes or collected responses. A single contact can belong to multiple groups, and there is no limit to the number of groups you can create.
You can learn how to create a contact group [here]. Within a flow, contacts can be added to or removed from groups by using the “Add a contact to a group” or “Remove contact from a group” actions, both of which are described in more detail [here].
Additionally, a contact’s groups can be accessed by referencing the @contact.groups variable.