Cypress introduced the experimental cy.session() command in version 8.2.0 to optimize the process of logging in during tests by caching and restoring session data such as cookies and localStorage, significantly reducing the time required to authenticate before each test. This feature allows tests to run faster by eliminating the need to repeatedly log in and out, and it supports switching between users more efficiently by clearing the active session before running login code. By employing cy.session(), tests can better mimic real-world scenarios as they no longer depend on the state of previous tests, enhancing both performance and reliability. Upgrading to this version requires enabling the experimentalSessionSupport configuration, and the Cypress team encourages users to provide feedback to further refine this feature. Additionally, users are advised to address potential CORS errors by ensuring proper authentication steps are implemented, with further resources available in the Cypress documentation and community channels.