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Sessions

A session is a group of interactions between a user and an application that take place within a given timeframe. A single session can contain multiple activities (such as page views, events, social interactions, and e-commerce transactions), all of which the session stores temporarily while the user is connected.

By default, when a user leaves a website or closes their browser, their session ends. To keep users from having to log in every time they return, applications can extend sessions by storing session information in a cookie. Sessions end when a user logs out or when session lifetime limits are reached.