In the context of the internet, "cookies" refer to small text files that are stored on a user's device when they visit a website. These files can be used to store information about the user's preferences, browsing history, and other data. When the user visits the website again, the website can access the information stored in the cookies to customize the user's experience or track their activity. Cookies can be useful for providing a more personalized experience for users, but they can also be used for tracking and targeted advertising. Users can choose to accept or block cookies through their web browser settings.