Dynamic lists automatically update from saved segments.
You cannot import or add contacts manually to a Dynamic list.
To get started you need
A Pro, Plus or Email Marketing subscription. If you're unsure what your subscription includes, please contact your account manager or firstname.lastname@example.org
How to create a Dynamic list
Navigate to the Messaging menu
Choose the Lists tab
Click + Create list
Give the list a name
Tick Make this a dynamic list
Choose the saved segment from the drop down to make the list from
Select which channels you wish to use the list for
If Email is selected, include the from email, from name and business address
If Facebook Messenger is selected, choose which Facebook page to send the message from
Click Save List
The new list will appear under the List tab