You can embed a external url in Leap's Instruction i.e. buttons. Once clicked will take to the specified web page or app.
Deeplink is helpful for all your in-app navigations. Suppose you want your users to navigate away from your app. For that External Link is helpful.
Let's take a example when you want your user's to redirect to playstore, so that they can rate your app. You can navigate to a particular app using Leap Elements with External Link enabled in the button.
Example - Suppose, you want user to redirect to the playstore app, you can configure a External Link https://play.google.com/store/apps/details?id=com.example.app to redirect to playstore and add it to Rate Now button in Leap Dashboard.