Use tag when there are questions specific to session management in any domain (web, mobile, etc)
As per introduction of a Session:
Session management is the technique used by the web developer to make the stateless HTTP protocol support session state by making use of session variables.
For example, once a user has been authenticated to the web server, the user's next HTTP request (GET or POST) should not cause the web server to ask for the user's account and password again.