Cookies are small pieces of text sent to your web browser by a website you visit. A cookie enables the website to remember your actions and preferences (such as login, language, font size and other display preferences) over a period of time, so you don’t have to keep re-entering them whenever you come back to the site or browse from one page to another.
A cookie file is stored in your web browser and allows the Service or a third-party to recognize you and make your next visit easier and the Service more useful to you.
Cookies can be "persistent" or "session" cookies. Persistent cookies remain on your personal computer or mobile device when you go offline, while session cookies are deleted as soon as you close your web browser.