The "Short URL" option allows you to create a customize link for your biolink landing page. It looks as follows:
If you left the short URL empty, what comes after "https://ezbiolink.com/" will be randomly generated.
However, you are more than welcome to choose and type what comes after. If cold be your user name, the name of your business etc.
Should you decide to change your page URL, you could simple change "your custom alias" box. We do not recommend changing this if you have shared your landing page on the internet. Remember that clicks to your previously shared link will not reach their destination.