A Branded Short Domain is the domain that takes the place of "bit.ly" in a bitlink. If you were to use "myname.me" as a domain, instead of appearing like this:
your links would appear like this:
A Branded Short Domain is a way to brand your links across the web! For example, The New York Times uses "nyti.ms" as a Branded Short Domain and TechCrunch uses "tcrn.ch".
Interested in setting up your Branded Short Domain? Learn the steps here.