When a web server sends a cookie to a browser, a file, usually a text file, is stored locally on the client computer. With each visit to a website the browser searches for cookies from the same website and consults and updates these cookies. This ensures a consistent connection between the browser and web server – the server recognises the client browser again.
Users can inspect the cookies stored on their computer and delete them at any time. A typical use of a cookie is to save personal settings on the website.
Cookie settings vary from browser to browser. You can find information on this issue using the help function on your browser.