Unless you are a developer, it’s not really important to understand the App Clips concept.
What is amazing to experience is the new iOS 14 ability to play a game demo in Safari itself.
Give this a try:
- Fire up iOS 14 Safari on your iPhone
- Tap this link to the FiriGames Phoenix II game page
- Tap the Play button in the top banner of the page
The game play is fun, but makes the larger point that you got to experience the game before you plunked down your hard earned bucks. A fantastic capability.