Web pages often need to store some information in our Internet Browser: e.g. to identify us as users,
to remember previous settings, previous accesses, or to customize our experience.
Browser Cookies are the most used tool to do that (although there are some others). Cookies are tiny text files stored in our own device, linked to the website that produced them at first, and they're send in every access to that website.
They are essential for many services to work properly, and they provide important advantages for users. On the other hand, Cookies can be used to track our activity by advertisement providers and social networks, like Facebook or Twitter.
When you access to a website, aside from the content of the site and its genuine cookies, you coud be downloading information from other sites, advertisements, social networks or other third parties. By default, browsers allow those other websites to manage their own cookies, called "Third Party Cookies". This way, these companies can gather our browsing habits
