The Pokémon GO is now updated with the new daily bonus feature which going to increase the available pokeball and XPs if you do several certain things in the game, everday.
You will get the extra items or XP like when you catch your first pokemon of the day or when you visit your first PokeStop.

This is a new feature which maybe going to brings back the players to play with the game everyday and growing back the game on the charts.
Niantic on the official news page published already what you can get if with your daily games. You can read it in here.

The new daily bonus feature already live in North America and Europe but in Japan it will be available from November 12, 2016.