https://docs.vmware.com/en/VMware-NSX-Intelligence/4.1/user-guide/GUID-BA3B0D67-4AA8-439E-A845-4598DAD6B9D0.html

The security policy recommendations are of the East-West distributed firewall (DFW) security policies in the application category. The security group recommendations consist of the VMs or physical servers whose traffic flows were analyzed for the time period and the boundary you had specified. The service recommendations are service objects that were used by applications in the VMs or physical servers that you had specified, but the services are not yet defined in the NSX inventory. https://docs.vmware.com/en/VMware-NSX-Intelligence/4.1/user-guide/GUID-BA3B0D67-4AA8-439E-A845-4598DAD6B9D0.html

The security policy recommendations are of the East-West distributed firewall (DFW) security policies in the application category. The security group recommendations consist of the VMs or physical servers whose traffic flows were analyzed for the time period and the boundary you had specified. The service recommendations are service objects that were used by applications in the VMs or physical servers that you had specified, but the services are not yet defined in the NSX inventory.