GMS Certified Devices
GMS stands for Google Mobile Services and it is a collection of Apps and APIs that will work across all of your devices. Some of the apps that come with GMS Certified Android Hardware are: Google Search, Google Chrome, YouTube, Gmail, Google Maps, Google Play Store, and more. If your devices are not certified, you will not have access to any of Google’s proprietary apps.
In order to certify a Android hardware through the GMS program, you must have a “MADA” License from Google. To ensure only the highest quality of devices are put out into the ecosystem, Google requires their GMS partners to go through a series of compatibility tests for each device. When Google certifies a device, it confirms that the device has passed security and performance tests and should ensure ease of use and reliability out of the box.