Banner Ads Best Practices

activity_main.xml

    <View
        android:layout_width="match_parent"
        android:layout_height="5dp"
        android:background="#FFEB3B"
        app:layout_constraintBottom_toTopOf="@+id/linearLayout" />

    <LinearLayout
        android:id="@+id/linearLayout"
        android:layout_width="match_parent"
        android:layout_height="60dp"
        android:background="#FF5722"
        android:gravity="center"
        android:orientation="vertical"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent">

        <com.google.android.gms.ads.AdView
            android:visibility="visible"
            android:id="@+id/adView"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentBottom="true"
            android:layout_centerHorizontal="true"
            app:adSize="BANNER"
            app:adUnitId="ca-app-pub-7490895093814553/1122447152">

        </com.google.android.gms.ads.AdView>

    </LinearLayout>