A dead link, also known as a broken link, is a hyperlink on a website that is no longer active or functional. This means that when a user clicks on the link, it does not lead to the intended destination and instead displays an error message or a blank page. Dead links can occur due to various reasons such as the webpage being deleted, the URL being changed, or the website being temporarily or permanently unavailable. They can be frustrating for users as they disrupt the flow of information and hinder their ability to access desired content. Webmasters and website owners should regularly check for dead links and fix them to ensure a smooth and seamless browsing experience for their visitors.