When creating marketing lists, there are three required fields that you must fill out:
Member type: This defines which core record makes up the marketing list. A marketing list can only have one core record type, which can be account, contact, or lead. Once the member type is set on a marketing list, it cannot be changed.
List name: This is a descriptive name for the marketing list. The name is shown on lookups for marketing lists, and is a primary field for the entity.
Type: This can be either static or dynamic. The members of a static marketing list do not change unless updated manually. A dynamic marketing list is defined by a query, and the members are dynamically updated.
Let us take a look how to create static and dynamic marketing lists.