set, cookies usually have the same domain attribute as the domain that a user is currently visiting – these are called first-party cookies. However, if a web page contains content from other domains (typically banner ads), cookies with a different domain attribute can be set as well. These are called third-party cookies, and can be read by the domain that set them. Third-party cookies can be used to easily track users across multiple domains, and are controversial with regards to data control and privacy. They can be blocked in most browsers, rendering them unsuitable for common analytics
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