Facebook OPG tag

I have added facebook opg metatag before </head> tag,

location:  root/templates/base/_header.html.

But it is now working properly.
Is _hearder.html file is correct file to add opg tag?

Yes. _header.html. However, if you have a custom template, then you need to place it in the _header.html file of your custom template and the the base one if your template has it's own.

However. What does your tag look like? You did not post what your trying to add.

If your using the tag as opg than that's incorrect. You used opg in both the title and message body of this post, but the correct term is og not opg.

So we need to see how you formatted the tag to tell you why it's not working.

Also, your dolphin cache needs to be cleared when you edit and of the template files.

Thanks for your quick reply.

I have cleared catch and now working fine!!

Thanks,