What is stealth forwarding?
Stealth forwarding is similar to domain forwarding except the domain name stays in the web browser's URL bar instead of being replaced by the new page's URL. This is is why it is called "stealth" forwarding because it appears that the web page displayed is actually part of the domain.
So say that you have a domain named myexample.org, and you want to use stealth forwarding to have your domain point to http://name.somedomain.com. When you use stealth forwarding, http://www.myexample.org will load the index page located at http://name.somedomain.com, however the http://www.myexample.org address will be displayed in the web browser's URL bar instead of the http://name.somedomain.com address.
Stealth forwarding only affects the domain itself. If you want to set up email forwarding with your domain, that is done separately.
See how to set my domain to stealth forwarding right in your Dynadot account.