How do I link a website thumbnail, (Whatsapp and Skype link image)? [duplicate]

This question already has an answer here:

• Provide an image for WhatsApp link sharing 9 answers

I have been looking for a long time but unfortunately found nothing, so I ask: How I do that?

I want to change the image of my Website if you send it with skype or whatsapp!

[Images in the yellow box!]

I don't mean the title icon: