title: Image in every post in WordPress
body: <p>If you visit <a href="http://www.catswhocode.com/blog/" rel="nofollow noreferrer">this site</a>, you will see that there is an image and summary for each post. What is the proper way to implement that?</p>
  
  <p>Is this done using WordPress custom fields? Or whether this is coded in <strong>image.php</strong> file present in theme folder? How do I do that?</p>