How to successfully implement og:image for the LinkedIn

Question

THE PROBLEM:

• I am trying, without much success, to implement open graph image on site: http://www.guarenty-group.com/cz/
• The homepage

Answer 1

For me solution was to put all the tags (without prefix) inside tag.

For other social networks like Facebook, Twitter or Google you don't even need to have tag. (because it it optional in HTML5 specs)

PS. There is a new nice way for testing tags on your website: https://metatags.io/