Deep link
Also called: App Link, Universal Link
A URL that opens a specific screen inside an app, from an email, a notification, a QR code or another app.
Definition
The app declares which URLs it handles and maps them to screens and arguments. Verified links (Android App Links, iOS Universal Links) open the app directly for its own domain. Deep links skip the usual path through the app, so the target screen must validate its input and check that the user may see it.
In practice
https://shop.example.com/product/42 opens the product screen for product 42.