https://www.techradar.com/news/google-play-instant-games-let-you-play-first-download-later

Ever wanted to play a mobile game, but were on the fence about downloading it? Or, maybe you did want to install a game, but there were too many steps involved, so you lost interest?

Google Play Instant hopes to solve this conundrum. Just like Android Instant Apps, which Google launched in 2017 to let you try (some) Android apps before downloading, Google Play Instant lets you try out Android games first, no install required.