The meta refresh is a method of instructing a browser to automatically refresh the current web page after a specified time interval. If a different URL is added in the content parameter, the browser will display the new address when refreshing. If the time interval is set to 0, the redirection occurs automatically as soon as the page is loaded and is usually invisible to the user.
This redirection in client logic (executed in the browser, as opposed to 301 or 302 redirections that are executed on the server) is often used in cloaking techniques to spam search engines by showing them search engine optimized content that is different from the content shown to users.
