App Clips | Definition
Apple’s App Clips are a smaller, temporary version of an app that can be downloaded and launched seamlessly from an external link without any user interaction or prompt. They function as a lightweight version of an app to perform a specific task and allow the user to eventually download the full app.
For example, a coffee brand creates an App Clip for potential users to order without using the full app. The user can later use the App Clip again or download the full app.
Instant Apps are Google’s form of App Clips and function the same way.