In cybersecurity, a session refers to a temporary, interactive exchange between a user and a computer system, such as when you log in to a website or app. During a session, the system tracks user activity and maintains state, allowing for a seamless experience. Sessions often use unique identifiers, like session tokens or cookies, to recognize users and manage their access. Proper session management is crucial for security, as attackers may try to hijack or manipulate sessions to gain unauthorized access.