_____ _               _               _____ ____  
 / ____| |             | |             | ____|___ \ 
| (___ | |__   __ _  __| | _____      _| |__   __) |
 \___ \| '_ \ / _` |/ _` |/ _ \ \ /\ / /___ \ |__ < 
 ____) | | | | (_| | (_| | (_) \ V  V / ___) |___) |
|_____/|_| |_|\__,_|\__,_|\___/ \_/\_/ |____/|____/ 

FAQ: What is MicroG?

MicroG is an open source replacement for Google Play Services on devices running Android. Since Google Play Services form a large part of the backbone of Android (many apps use the services), it is a very helpful piece of software for people going NO GAPPS. It is developed almost solely by Marvin W, user MaR-V-iN on the XDA Forums. It is very much a work in progress, though it is plenty stable for everyday use and the core functionality is in place: location services, Google authentication, and Google Cloud Messaging, which many apps use for notifications. You can find the full implementation status on the project's GitHub wiki.

Implementation status on the GitHub wiki