The canonical URL for the page you want to share is set via the property tag property og:url. What does it mean? It is important to have a permanent URL for the same content if the main material on the page does not depend on the parameters passed . This is important if the reference uses the transfer of GET parameters (for example, filter values).

<meta property='og:url' content='http://www.yourdomain.com' />

It is recommended to make the link address absolute, with the explicitly specified scheme of the data transfer protocol used: http or https. This will eliminate errors in the formation of the route during the transition.

For a preliminary assessment of the snippet for your link, we recommend using the automatic  code designer for the Open Graph microdata , which will produce ready-made HTML for insertion into the site.