Google Play Instant enables native apps and games to launch on devices running Android 5.0 (API level 21) or higher without being installed. You can build these types of experiences, called instant apps and instant games, using Android Studio.
Instant Win games are easy to define as they are titles that provide opportunities for players on a play-by-play basis, in much the same way that a scratch card or lottery ticket out in the real world would. Perhaps players have heard of these games before but have yet to try them out.