How will be logout of page after some inactivity?

Question

If login to a website, even if dont logout then still its automatically logout after some inactivity. How and why this happens??

Answer 1

every login session usually has a timeout/expiration.
its one of many ways to protect your account from being stolen

Answer 2

what it ? the feature ? yes. its created during the development.

the session and timeout created when you accessing/logging in the web

Answer 3

Ok,
But it's done during creating website??

Answer 4

Ok,Thankyou