“infomation_schema” , “my_bd” , “mysql” and “test” are the databases on the server. If you click the + objects (tables and other objects) in each databases will show.
“infomation_schema” and “mysql” are mysql system databases.
“test” is a database that gets installed when mysql get installed. This is not impotant. Actually it is recommended to drop it on production servers.
“my_bd” must be a database that you or some application-installer created.