Hi partner,
Now Dynamics 365 has multiple kinds of applications.
Normally we could divide it into ERP and CRM modules.
1.If you want to use D365 to help you with ERP business in your company, you could use Dynamics 365 ERP applications like
Finance for monitoring performance in real time, predict future outcomes, and make data-driven decisions to drive business growth,
Supply Chain Management for your global operations and act,
Human Resource for your employees succeed and many other applications.
https://dynamics.microsoft.com/en-us/finance-and-operations-to-finance-and-scm/
2.If you want to use D365 to help you with managing your customers and accounts for better sales, you could use Dynamics CRM applications like
Sales for finding more leads, and convert to opportunities,
Customer Service for after-sale management, handle survey and tickets from accounts.
https://dynamics.microsoft.com/en-us/crm/what-is-crm/
https://dynamics.microsoft.com/en-us/sales/overview/
You could go to Dynamics 365 home page and find more information and samples.
https://dynamics.microsoft.com/en-us/sales/overview/
Finally I still recommend you to call with our sales for more details.
https://dynamics.microsoft.com/en-us/contact-us/
Best Regards,
Leo