Before downloading, you must know your device's CPU architecture: For most older 32-bit devices. ARM64: For newer 64-bit devices.
Understanding and Installing GApps for Android 6.0.1 (Marshmallow) gapps android 6.0.1
Includes the Play Store plus "Hey Google" support and basic sync features. Micro: Adds Gmail, Calendar, and Google Now. Before downloading, you must know your device's CPU
When you flash a custom ROM or a "vanilla" Android build, you essentially have a clean slate without Google's ecosystem. GApps provide: gapps android 6.0.1