Below steps are must to make the Nifty Open Graph take effect
Create a new 'Custom' module with below options set,
- Goto 'Options' tab and choose 'Prepare Content'
- Goto 'Menu Assignment' tab and choose the pages you want Open Graph meta tags to be generated
- Choole a 'Position' which is available on all the pages selected in previous step
- Hide the module title display
Make sure the plugin is enabled.
