A "redirect" is a web technique used to send users from one URL to another. This is often done when a webpage has moved to a new address or when a website is reorganized. Redirects help maintain user experience by automatically guiding visitors to the correct page without encountering a "404 Not Found" error. There are different types of redirects, such as 301 redirects for permanent changes and 302 redirects for temporary ones. Search engines like Google recognize these redirects, which can also help preserve search engine rankings and ensure that users find the content they are looking for.