<meta http-equiv="refresh"
content="0; url=http://example.org/new-page.html">
HTML redirect. HTML meta refresh redirection code.
HTML meta refresh redirect is a client side redirect and is not 301 permanent redirect.
The HTML meta refresh with 0 seconds time interval, is considered by Google as a hint for 301 redirect for pagerank transfer.
If you want to do real 301 permanent redirect, you can do it with PHP redirect after enabling PHP code in HTML files.
header("HTTP/1.1 301 Moved Permanently");
header("Location: http://example.org/new-page.html");