As the name indicates Core Database is the backbone of the Sitecore application and it is used for multiple purposes.

Core database contains all Sitecore SETTINGS. It contains the definition of Desktop Mode, Content Editor, PAGE Editor etc. The core database contains data needed by the Content Manager.

All the menu ITEMS in the Ribbon is stored in the Core Database. In case if you need to create a new menu ITEM in the ribbon you need to add the context and definition in the Core Database. It Contains the membership related tables which drive Sitecore AUTHENTICATION, Authorization, and Security.

As the name indicates Core Database is the backbone of the Sitecore application and it is used for multiple purposes.

Core database contains all Sitecore settings. It contains the definition of Desktop Mode, Content Editor, Page Editor etc. The core database contains data needed by the Content Manager.

All the menu items in the Ribbon is stored in the Core Database. In case if you need to create a new menu item in the ribbon you need to add the context and definition in the Core Database. It Contains the membership related tables which drive Sitecore Authentication, Authorization, and Security.