When will Google Analytics end a session by default?

Google Analytics ends a session by default when a user is inactive on your site for 30 minutes or more, or when they close their browser window. This ensures that user engagement is accurately measured. If a user returns to the site after 30 minutes of inactivity, a new session begins. If they close the browser and reopen it, that also starts a new session. The option "After 30 minutes, regardless of user activity on your website" is incorrect because activity resets the 30-minute timer. "Once the user opens another browser window" is incorrect; opening a new window doesn't end the current session. "At noon every day" is incorrect; session termination is based on user behavior, not a fixed time of day.