There are two ways of sharing content externally (third parties):
Share a public link by mail – once viewing the content, press the share tab and click on share public link.
Embed HTML code to external platforms - once viewing the content, press the share tab and click on embed code. You will need to copy and paste the HTML that is automatically created.
If any time you wish to stop sharing the content on all the pages that you have published it, press the unshared option (this one will appear once you have shared the content).