You probably don't want customers browsing to categories that are empty, or even have empty categories displayed in the menus you build. There's now a very easy way to hide them!
This option is unique to Catalog Containers so you can specify containers you may or may not want to display the empty categories in.
Simply navigate to the required Catalog Container in your admin screen, and you'll see a toggle for 'Exclude Empty Categories'. Enable this, hit save and any empty categories will be hidden from storefront view or menu creation.