Question : application roles vs DB roles

what is app roles vs the reg DB roles (db_ddladmin, db_backupoperator etc).

Where can I find the app roles in SSMS?

Thanks

Answer : application roles vs DB roles

App roles are specific to Database and hence it can be viewed(if exists) in SSMS under Database -> Security -> Roles -> Application Roles.
DB Roles, you can find it under Database roles instead of Application roles in the above path..