How to remove caching when sharing in a social network?

Question

Facebook

Hello, I'm making a small service
At the last stage, there is an opportunity to share the result in social networks, but for some reason the picture is used by
default .
Maybe it's caching, how to solve the problem?

Answer 1

1. You need to make a separate page for each photo.
2. There is documentation for all social networks:

• Facebook: Debugger , Documentation
  
• VK
  
• Twitter
  

Answer 2

Add random hash to URL. When sharing the result, assign a unique id.
Or call https://vk.com/dev/pages.clearCache when updating the page.