Internet applications use the HTTP protocol, following a request-response paradigm. As each request is independent of the other, we need to find a way to maintain some information across multiple requests. For that, either we put all the common data in each request, or we put key(s) in request(s) to store the data on the server against each key.

State management is a basic requirement for any web application. As a user interacts with an application, we need to maintain the user’s preferences — the application state with its corresponding actions…Read complete post on sitepoint.com