Sharing url link does not show thumbnail image on facebook

Question

I have some example url that provide for facebook sharing. But the image inside the url page does not show on facebook comment box. I have already inserted Meta tag like thi

Answer 1

Your meta tag should look like this:

And it has to be placed on the page you want to share (this is unclear in your question).

If you have shared the page before the image (or the meta tag) was present, then it is possible, that facebook has the page in its "memory" without an image. In this case simply enter the URL of your page in the debug tool http://developers.facebook.com/tools/debug. After that, the image should be present when the page is shared the next time.