Directory Services are systems that store, organize, and provide access to information about users, devices, and resources within a network. They help manage identities and facilitate communication by allowing users to find and connect with each other easily. Common examples include Active Directory and LDAP (Lightweight Directory Access Protocol). These services enable administrators to control access to resources, enforce security policies, and streamline user management. By centralizing information, Directory Services improve efficiency and help maintain an organized structure within an organization, making it easier to manage large numbers of users and devices.