Okta SSO (Single Sign-On) is a cloud-based authentication service that enables users to securely access multiple applications with one set of login credentials. By centralizing authentication, Okta SSO simplifies user management, enhances security through features like multi-factor authentication, and reduces password fatigue. Organizations use Okta SSO to streamline access to cloud and on-premises applications, improve compliance, and minimize the risk of unauthorized access. Okta integrates with thousands of popular apps and supports various authentication protocols, making it a flexible solution for businesses of all sizes.