If some of my app get warning from google “Warning of Google Play Developer policy violation: Action Required“,
Category Icon will display at android as icon at category, good icon will help user to catch the information and easy understand about category. So make sure you pick the best icon for category.
Continue reading Guide category icon for Markeet Panel
From your firebase admin please click Add Firebase to your Android app like this picture :
As Developer android if we want to implement GCM push notification we need to obtain GOOGLE API key for GCM. here brief tutorial :