Explanation
A service account platform is a type of platform that defines how CyberArk manages passwords for service accounts, which are accounts that run applications or services on remote machines. A usage is a configuration that allows CyberArk to manage passwords for files, such as XML or INI files, that are stored on remote machines. A usage is associated with a parent account, which is the account that has access to the file. A usage can be added as a service account platform if the file contains the password of a service account. For example, IIS Application Pools is a usage that can be added as a service account platform, because it manages the passwords of the application pools that run on IIS servers. The other options, Kerberos Tokens, PowerShell Libraries, and Loosely Connected Devices, are not usages that can be added as service account platforms, because they do not manage passwords for service accounts. References: Usages, Service Account Platforms