We've been using this plugin in our Joomla website. While sharing any article on Facebook, it shows article title and image on the post confirm window. After the article is shared, it only shows article title, no image is displayed.
I've gone through other posts regarding this issue. There people have mentioned OG image tag to be placed but I'm not sure how and where i need to place it.
Also, I did not find any option to customize the post that is shared on Twitter.