Cookies are small text files stored on your device when you visit websites. Think of them as tiny notes that help websites remember who you are and what you were doing.
They contain bits of information like session identifiers, user preferences, or authentication tokens. Most websites use them because they make browsing smoother and more personalized.
Besides traditional cookies, we also use similar technologies like web beacons, pixels, and local storage. They all serve roughly the same purpose but work in slightly different ways behind the scenes.