Dashboard provide most important statisics and information.
You can add, edit or disable additional administrators that are going to manage your site.
Websites management. Some websites require some configuration (like API key) and this can be done right here. Additionally you can disable some websites that you don't want to support.
CMS (Block, Pages, Menus)
Gives possibility to quickly build your website. Supports multiple languages.
You can change some global application settings like default language or appearance.
Managing application languages. You can add new, edit existing one, disable or enable languages.