creates an invisible frame set
shows the destination URL which can mask that a redirect has occurred.
301 Redirect is a permanent redirect
The common use case for this to create a web forward and leave it in that state for the foreseeable future
This web forward is also better for Google SEO ranking and is the most frequently used type of web forward.
302 Redirect is a temporary redirect
A common use case for a 302 is a redirect page that put up during a site maintenance