They are widely used in order to make websites work, or work in a better, more efficient way. They can do this because websites can read and write these files, enabling them to recognize you and remember important information that will make your use of a website more convenient (e.g. by remembering your user preferences), and to make us serve you better and more efficiently.
In some circumstances, we may work with third parties to provide services on our Site. Third-party advertisers and other organizations may use their own cookies to collect information about your activities on our Site and/or the advertisements you have clicked on. This information may be used by them to serve advertisements that they believe are most likely to be of interest to you based on content you have viewed. Third-party advertisers may also use this information to measure the effectiveness of their advertisements. We do not control these cookies and to disable or reject third-party cookies, please refer to the relevant third party's website.