Short Link Feature allows everyone to share link of their Profile to everyone instead of giving your contact details to each other. You just have to copy that Link and send it to anyone. The other person will just click on that Link and your Whatsapp Business Profile will Automatically open up.
Just look at it how it Works.
Open Whatsapp Business Profile and click on top right 3 dots to open settings.
Just click on option "Setting" like this
Now click on the option "Business Settings" like this
Now click on the option "Short Link" like this
Now click on the option of Copy like this
When you send that link to anyone and when She will click on it, then your Whatsapp Business profile will open up like this