You installed vCenter Single Sign On in the previous task. Inventory Service stores vCenter Server application and inventory data, which lets you search and access inventory(فهرست) objects across(در سراسر) linked vCenter Server instances(نمونه ها).

Vmware vCenter Inventory service is one of the prerequisites for vCenter server installation. It stores vCenter server inventory data and server application data. It also allows you to search the inventory objects across linked vCenter server instances.