When this is set to Yes, and sub-directory or filename under the source URL path will not be included in the redirect. For example, if you redirected `/google` to `http://www.google.com` and a browser accessed `http://example.com/google/something` , the destination URL would still be `http://www.google.com`.

If No was selected in this example, the destination would be `http://www.google.com/something` instead.

However, if Yes is chosen you can use the special code `$1` in the destination URL. This will be replaced by the sub-path or filename that comes after the source URL path.