This is the section in your admin console that gives you the tools to custom the console itself according to your needs.
It is divided into two sections:
This sections deals with list-specific settings, i.e. settings that are only valid for the list you are in. A "list" in the MailUp admin console is an independent set of messages, settings, statistics, filters, events, groups, subscribers, unsubscribers, etc. You can create multiple Lists in your admin console. Note: "List" in the MailUp console is not to be confused with "Groups" which is a subset of a List.
These settings allow you configure every feature of your admin console which is not list-specific, but related to the admin console as a whole, or that helps you manage more easily your every-day work inside your admin console.