User agent cloaking refers to the practice of a website or web server intentionally providing different content to users based on their device or browser’s user agent string. This technique is often used to manipulate search engine rankings by showing different content to search engine bots than what is shown to human users. It can also be used to deliver tailored content to specific devices, such as mobile or desktop, in order to improve user experience. However, user agent cloaking is considered a deceptive and unethical practice, as it can mislead both search engines and users.