Cookies allow third parties and websites to track a user's online activity and browsing history without consent. Websites can see where users click and navigate next, and can also track users across other websites. While users can disable cookies, websites make this difficult and users need advanced computing skills to both turn off cookies and still use the website. With cookies enabled, websites are able to retrieve private information like emails, passwords, personal details, and credit card numbers, threatening users' privacy and security.