title: What is the purpose of setContentDescription() of a view?
body: <p>I was in a dialemma on how to associate a string information to a view. I came across two methods </p>
  
  <blockquote>
    <p>setTag()</p>
  </blockquote>
  
  <p>and </p>
  
  <blockquote>
    <p>setContentDescription()</p>
  </blockquote>
  
  <p>Both served my purpose. </p>
  
  <p>I know that setTag() is used in this cases generally. But when is setContentDescription() method used? , what is exact purpose of setContentDescription()?</p>