With role-specific access in the app, the first thing you will notice when you login is that you have access to the same dashboard you have in the Dynamics NAV ERP. So, if you are a salesperson, you will have access to the same customized tiles you have with information such as open sales orders and quotes under Sales Order Processor, etc. in the home screen. Another user with a different role will have access to the view that has been configured for that role in the home screen.
In terms of functionality, you will not find much of a difference when you use the app. For example, if a salesperson wants to access details of the client before a meeting, the app shows the same access starting from the name of the client, company, address, etc. You will also have the option to view the address of the company on a map, just as you would when using Dynamics NAV in the office.