title: How Google Cloud Messaging Service in Android Works?
body: <p>I want to use GCM Service in my application.</p>
  
  <p>I have referred to the following link (<a href="http://developer.android.com/guide/google/gcm/index.html" rel="noreferrer">Android Developer: Google GCM</a>) but was not able to install the GCM Library in my eclipse. </p>
  
  <p>From the SDK manager I am not getting GCM Library in the Extras Folder.</p>
  
  <p>Can anyone please help me?</p>