Clickjacking is a type of cyber attack where a user is tricked into clicking on a webpage element that is not what it appears to be. This can be achieved by overlaying an invisible or disguised frame over a legitimate part of a webpage. For example, a clickjacking attack might overlay a transparent button over a legitimate button, leading the user to perform an unintended action, such as liking a Facebook page or downloading malware. Clickjacking poses serious security risks, as it can be used to gain control of a computer, steal confidential information, or manipulate users.