Persistent Cookies
Persistent cookies are HTTP cookies stored on a user's device with an expiration date, allowing websites to remember user information across multiple sessions. They are saved to disk and persist even after the browser is closed, unlike session cookies which are deleted when the browser session ends. This enables features like login persistence, user preferences, and tracking over extended periods.
Developers should use persistent cookies when they need to maintain user state or data across browser sessions, such as for 'Remember Me' login functionality, storing user settings, or analytics tracking. They are essential for creating personalized web experiences and improving usability by reducing the need for users to re-enter information. However, they must be implemented with privacy considerations, as they can be used for tracking and require compliance with regulations like GDPR.