The default image for display in social. networks when reposting and mentioning the site?

Question

WordPress

There is a site on wordpress.
How to make it so that:
- if we repost a page without an image
- just indicate the URL of the page or site in Vkontakte:

some of my pictures were substituted?
What is missing? Some kind of plugin? Tag?

Answer 1

In the Yoast SEO plugin , you can configure this

Answer 2

It turned out that VKontakte caches, peeped here: Why VKontakte does not pick up my OpenGraph image?