Hey Giovanni,

I am really sorry for the delay of this reply as it is a weekend for us here. The problem is your blog posts are not made public. In order for you to share something on Facebook, Facebook needs to be able to crawl the contents.

You can simulate this by accessing the page https://www.reusedworld.com/blog/l-italia-del-riciclo-2017-presentazione-del-rapporto as a public user. This is exactly what Facebook sees on their end. You can try their link scrapper tool from https://developers.facebook.com/tools/debug/

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ok, thanks I understood.
is there the possibility of making public only post blogs?

hello, thank you, I found the setting.

You are most welcome Giovanni, glad that your issues are resolved now