Static lists are a list of contacts who meet certain criteria at the point when the list is created. It doesn’t get updated automatically. News records need to be manually added and removed from the static list.
Some of the best use cases of a static list include sending one-time email blasts or sending emails to a list of contacts that don’t change often. For instance, staff lists for an internal newsletter.
You can even create a static list to delete bulk data contacts from your account.