Cookies are just pieces of code that exist in your computer’s web browsers and they store information that helps identify you and help enhance your experience online. third party cookies as compared to first party cookies are non-domain created and are used mostly for advertising. Generally, they are those creepy ads found on the left or right or at the top or bottom or top of most web pages. They target customers based on user behavior online. They are generated mostly when a website comes with sources from multiple sources. In the case of Amazon, for instance, its web pages are designed in a way that a few sections of these pages have ads from other third party companies. These third party companies are able to store their cookies on the user’s browser as third party cookies.
When the cookie is created on the browser, these third party companies logs these cookies as data on their servers. Once a user click on their ads, it will add that click to the log. This repeated algorithm helps these companies understand how users respond to certain ads and the various patterns in which users visit these sites where their ads are placed.