AdMob helps you monetize your mobile app through in-app advertising.
There are some Ad Formats used in this project:
*Banner
*Inerstitial
*Native
*Rewarded
*App Open

Firebase In-App Messaging helps you engage your app's active users by sending them targeted, contextual messages that encourage them to use key app features.

Firebase Crashlytics is a lightweight, realtime crash reporter that helps you track, prioritize, and fix stability issues that erode your app quality. Crashlytics saves you troubleshooting time by intelligently grouping crashes and highlighting the circumstances that lead up to them.

Lottie is a library for Android, iOS, Web, and Windows that parses Adobe After Effects animations exported as json with Bodymovin and renders them natively on mobile and on the web!
LottiAnimationView created in splash xml like this.

<com.airbnb.lottie.LottieAnimationView
    android:id="@+id/animationView"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:lottie_autoPlay="true"
    app:lottie_loop="true"
    app:lottie_rawRes="@raw/lizardrunninglottieanimation" />