Resource pools are useful for managed backup service providers (MSPs) that provide Office 365 (Exchange Online, OneDrive for Business, SharePoint Online, Teams), Azure AD, and Dynamics 365, backup services to their tenants using Office 365.
An MSP administrator can use a resource pool to map all the infrastructure details that are needed for the Office 365 apps to the storage pool. Then the tenant administrator can create the Office 365 apps using minimum details.