These elements are required to enable the basic functions of the website.

These elements are used to deliver advertising that is more relevant to you and your interests. They can also be used to limit the number of times an advertisement is displayed and to measure the effectiveness of advertising campaigns. Advertising networks usually place them with the permission of the website operator.

These elements allow the website to remember your choices (e.g., user name, language, or region you are in) and provide enhanced, more personalized features. For example, a website may provide you with local weather forecasts or traffic news by storing data about your current location.