Google Analytics is a very well-known product and I think no developer needs its introduction. Google Analytics for Firebase is a free analytics solution to measure the user engagement with your app. It also provides insights on app usage. Analytics reports help you understand the user behavior and hence better decisions can be made regarding app marketing and performance optimizations. You can generate reports based on different parameters, such as device types, custom events, user location, and other properties. Analytics can be configured for Android, iOS, and C++ and Unity apps.