What are the differences between active and static lists?
Active lists are continuously updating according to the set filter. This means that your active list will continuously scan your HubSpot for contacts that match the filter and add or remove them from your list by itself.
Static lists are snapshots of a specific moment in time. You can add and remove contacts as you like from this list. The list can't read changes in properties or the like so you have to monitor your contacts manually if you want the list to be up-to-date. You can clone an active list and make it static.