As soon as you paste a link in Supernotes, it will automatically recognise it and format it for you in Markdown so you don't have to. It will look like this:
[Name of Link](https://urloflink.com)
The first part in square brackets,
[ ] , is the name and the second part in parentheses,
( ) , is the URL.
As you can see in the example below the link text is changed to just google rather than the whole URL. Make sure to include
https:// otherwise the link will be treated as an internal Supernotes link.