How to change the repost parameters in the plugin?

Question

WordPress

The site has a SumoMe plugin (Pop-up left menu with social network buttons)
1. Here, when you click share on facebook in the left menu (in the plugin), there is no picture at all in the window that opens.
alocubanolisandra.com/home-version-9/y_lost-on-you
2. And here is the same plugin, but when you share this link in FB - the picture is big and it is there :D
www.salserosenclave.com/video/lisandra-garcia -y-yo...
Questions:
1. Where does the plug-in get pictures from?
2. How to make a picture bigger and put it in general?
3. Or maybe there is some other plugin in which you can choose an illustration for the repost.
PS There is a free version in both the first and second examples.

Answer 1

most likely, it's not the plugin, but the markup of the site.
pay attention to the meta tag og:image
, it determines which image will be displayed in the post created by the plugin,
compare the values ​​​​of this meta tag on the pages you provided.
The size of the picture can be controlled with og:image:widthandog:image:height