title: Facebook share thumbnail for a website
body: <p>I have used all the meta tag in rails app for facebook sharing and tested it facebook debugger. It is taking image not from <code>og-image</code> tag . It is taking image from an ad which is posted on my site. But should it not take image from from the content i set in <code>og-image</code> ?</p>
  
  <p>I added prefix tag , and image url is also correct. I also set image type just for trial. But it is not working.</p>
  
  <pre><code>&lt;head prefix="og: http://ogp.me/ns#"&gt;
  &lt;meta property="og:image" content="domain/images/facebook-share-image.jpg"/&gt;
  &lt;meta property="og:image:type" content="image/jpeg"&gt; 
  &lt;meta property="og:image:width" content="1200"&gt;
  &lt;meta property="og:image:height" content="630"&gt; &lt;/head&gt;
  </code></pre>
  
  <p>If you need other info regarding this, I am ready to serve.
  Thank You. </p>