Why my post thumnail didn't show exactly on Facebook?

[Maxwell]

Hello,

Sometimes I share some posts from my websites to facebook page or profile but amazing that post thumnail automatically show on facebook didn't show exactly?

why that and what do I need to do to show exact thumnails as expecting?

 

[Deepak Kaushik]

When you post any link to your page or profile then an automatically thumbnail generates. Then you can change your image as per your selection. If you don't want that thumbnail then you can also remove it.

But details like Title and description will be same because there is no option to change them.