AWS Technical Essentials Practice

AWS Single Sign-On (SSO) is specifically designed to simplify and centralize access management across multiple AWS accounts and business applications. By using AWS SSO, organizations can manage user identities and provide secure access to various AWS resources and third-party applications from a single place. This eliminates the need for multiple login credentials, streamlining the user experience while enhancing security through centralized control.

The service allows administrators to create permission sets that define what resources users can access and what actions they can perform across different AWS accounts. Moreover, AWS SSO integrates with existing identity providers, which further enhances its capability to manage access across a wide range of applications used in businesses.

This focus on managing access is why AWS SSO is the correct answer in this context, clearly making it distinct from the other options, which do not pertain to managing user access or identities in the same effective manner.