Which  is the best game in  playstore?

It depends on what kind of games you like to play, there's a whole bunch of categories of you can play like for example: action, platformer, racing, survival, TD, MMORPG etc. I personally don't have a favourite game since there a lot of genres, usually it more of a what game fits my mood most.

I can recommend it POU because it is a game that will drive you crazy from playing it so much go and download it enjoy it

I've been playing Hills of steel and Raid heroes: total war for very long time

if you want a nostalgia strike you may play Hill climb racing or Jetpack joyride

Pubg Aka Bgmi .best game for me