Motorola launched Moto G4, G4 Plus and G4 play in 2016. Motorola G4 and G4 Plus received Android Nougat last year, but G4 Play has been left out. Motorola promised to bring update to G4 Play in June 2017, but as promised the update was not released due to some unavoidable reasons. Now the Android Nougat update 7.1.1 is started to hit G4 Play devices, with November security patch.
If the update is not shown, head to settings -> about phone-> software update.