Definition of Databases Icons:
Assists you in creating databases, database users, and linking your database, user, and set the users permissions.
This is the easiest way for beginners to setup a database with a user and set permissions.
(Advanced Users) This allows you to modify your existing databases as well as upload a SQL Database or dump/drop a SQL Database.
(Advanced Users) This allows you to make your databases available to other site/sites via their domain.