The URL prefix is the first part of the path in your funnel URLs. The default is free, which produces URLs like:
You can change this to anything you like. Some popular alternatives:
free (default), yourdomain.com/free/FunnelName/
gifts, yourdomain.com/gifts/FunnelName/
resources, yourdomain.com/resources/FunnelName/
download, yourdomain.com/download/FunnelName/
Warning: Changing the URL prefix will break any existing links you have shared publicly. Make sure to update any links on social media, emails, or advertising campaigns if you change this setting.