This often happens if you use a Chinese smartphone, as Google is not all give permission to preset your application package. Any such can be found in the emulators, bright example - good Remix OS but without Google Play Store is not convenient. Or another option is a custom firmware. Honey, not all remotely include Google app part of the firmware by default. Or the Chinese, for example, MIUIm if you download not global, and the Chinese version, there Google Applications will not find. By the way, they almost always and everywhere is abbreviated as GApps.
Sometimes it so happens that in hand comes across a smartphone that is all good, but there are no proprietary applications Google. And all around not screaming about bloatware, it turns out that the software from Google - thing nice, and it's so convenient. At least much sureset positive impressions no Google Play app store.