The following Gapps is very simple and minimal and includes the Play Store. These Marshmallow Gapps are 100% compatible with any Android smartphone, tablet, or any other device that runs Android. Make sure you install Gapps so you have Play Store.
Without this, you will not have Play Store on the phone.
For Android 6.0/6.0.1 custom ROMs, you will need to use Android 6.0 Marshmallow compatible Gapps.