I cannot figure out why I have to use two meta-data elements in my manifest in order to get to work my Google Maps API v2 project.
What is the purpose of these tags?

```
<meta-data 
    android:name="com.google.android.gms.version"
    android:value="@integer/google_play_services_version" />

<meta-data 
    android:name="com.google.android.maps.v2.API_KEY"
    android:value="MY_API_KEY"/>

```