Not surprisingly, lists are a big topic in MailChimp’s knowledgebase. Here are some of the important concepts to know.
Lists are your contacts who have willingly opted-in to be included in your database. MailChimp calls your contacts “subscribers”. While you can have multiple lists with MailChimp, it is best to only have one list. It is easier to manage. If you think you need many lists, create one list with many Groups.