Clickjacking is a malicious technique used by attackers to trick users into clicking on something different from what they perceive. This is often done by overlaying a transparent frame over a legitimate webpage, making it seem like the user is interacting with the visible content while they are actually clicking on hidden buttons or links. The goal of clickjacking can vary, including actions like changing account settings, making purchases, or even sharing personal information without the user's consent. To protect against clickjacking, websites can implement security measures such as X-Frame-Options headers, which prevent their pages from being embedded in iframes on other sites.