Google is rolling out a Try Now button to test instant apps on the Play Store - news

The new app model does not require an installation process for an app or parts of it to work and has multiple potential uses.

The Google Play Store will now let users try apps before they buy them - Jersey Evening Post

Google readying Instant App demos for paid, unreleased games - 9to5Google

Google Play Replaces Family Apps With 'Teacher-Approved' Kids Tab

The Play Store gets a “try now” button for games, no install required

Google Play Instant lets you try games without having to install them

Google Play Instant Apps & Games Not Working? Check These Settings « Android :: Gadget Hacks

Google upgrades Play app with Instant playing, Arcade mode - news

Google Play - Wikipedia

Google Assistant – Apps on Google Play

Google Play Instant Games – How to add Google Play Instant to Google Play Store – The Knights of Unity

Google Play Instant lets you try games without having to install them

Digital Goods Transaction of Actions on Google (Build Android App), by Yoichiro Tanaka