Redirect to another URL
Responds with a HTTP 303 See Other response instead of a HTTP 200 OK, normally considered a quiet change of URL.
It takes one parameter, which is the new location to redirect to. This can be a relative or absolute URI. This will be passed as a Location response header item:
Location: http://example.com/
You can still add information to the request using the On request > Add to response actions, but most browsers will be already loading the new URL and won't render it.
HTTP 303 redirected destinations are always requested with a GET request.
Read more about HTTP 303 See Other.
Putting the new location as blank "" will result in no error on server side, but on a web browser, you will get an "invalid response" error page, with no attempt to reload the page.
You can, however, put in the same address that they just entered, which will result in a second request. Why you would want to do that, though…