What are domains in the context of Sitecore?

In Sitecore, domains refer specifically to contexts that define user authentication for tenants. Domains are used to segment user accounts and access rights within the Sitecore platform, allowing for more granular control over user interactions with the content management system. Each domain can represent a different tenant or a different set of authentication rules and access levels, enabling organizations to manage permissions for various groups effectively.

This segmentation is particularly important in situations where multiple distinct user bases require tailored access to specific areas or functionalities within the Sitecore environment. By utilizing domains, Sitecore ensures that user management aligns with the organizational structure and security requirements of the implementing entity, thus enhancing both control and flexibility in user authentication processes.