There are two types of cookies:
Session cookies are erased when the user closes the Web browser. The session cookie is stored in temporary memory and is not retained after the browser is closed. Session cookies do not collect information from the user’s computer. They typically will store information in the form of a session identification that does not personally identify the user.
Persistent cookies are stored on a user’s hard drive until it expires (persistent cookies are set with expiration dates) or until the user deletes the cookie. Persistent cookies are used to collect identifying information about the user, such as Web surfing behaviour or user preferences.
Session cookies are used to keep track of your activities when you move from page to page within the site and that any information you have entered is remembered. The cookie is deleted when you close your web browser, or after 30 minutes of inactivity on the web site. It does not collect any personal information from the user’s computer.