You have full control over how your links look, including using your own branded domain name and unique back-halves of your short links that show your audience where you’re sending them before they click.
On the short link setting page, click on the Edit short link icon (#1 on the illustration below).
Then in the text field of the pop-up window type, the name of the link (a.k.a. “path,” “slash,” “hash,” “link extension,” etc.) that you want your link to have. Note that if someone has already created the link with a similar path for the same domain (default domain is wow.link; however, you can add your own domain), then you will have to type a different path that has not been used already.