It's always best to use Apps because they work instantly and engage visitors without leaving your Link in Bio. Read more about how Link in Bio Apps work →
How to add an External Link
From the profile editor, tap Add App or Link.
Select External Link.
Paste the URL of your External Link.
On the Link Detail screen, you may enter a new name for the link, and select a different image for the Link Thumbnail.
When you're finished, press Save.