They are those that allow the user to navigate through a web page, platform or application and use the different options or services that are there.

They are those that allow the person responsible for them to monitor and analyze the behavior of the users of the websites to which they are linked.

They are those that allow the management, in the most effective way possible, of the advertising spaces that, if applicable, the publisher has included in a web page, application or platform from which it provides the requested service based on criteria such as the content edited or the frequency with which the ads are shown.