AdMob

Easy to Launch, Long Term, User Value
Paid Donwloads: no, no, yes
Subscription: no, yes, yes
Displaying ADs: yes, yes, yes
In-app purchase: yes, yes, yes

Common Monetization Models
-ADs & In-app purchases, subscription & in-app purchases, paid download & in-app purchases

USERS -> APPS(publishers) -> AdMob -> ADVERTISERS
https://www.google.co.jp/admob/

Types of ADs
-Banner ADs: TEXT, Image
-Interstitional ADs: Text, image, video
-Native ADs

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout
	xmlns:android="http://schemas.android.com/apk/res/android"
	xmlns:ads="http://schemas.android.com/apk/res-auto"
	android:id="@+id/mainLayout"
	android:layout_width="match_parent"
	android:layout_height="match_parent">

	<com.google.android.gms.ads.AdView
		android:id="@+id/adView"
		android:layout_width="match_parent"
		android:layout_height="wrap_content"
		android:layout_alignParentBottom="true"
		android:layout_alignParentLeft="true"
		ads:adSize="BANNER"
		ads:adUnitId="cp-app-pub-xxxx/xxxx"/>
</RelativeLayout>