When you share Joomla links on Facebook and Twitter, those sites don't find the correct information unless you are using Shack Open Graph.
Demo: https://www.joomlashack.com/joomla-extensions/shack-open-graph/
TAGZ Pro embeds Open Graph and Twitter Cards into your Joomla! based website.
Demo: https://www.roosterz.nl/joomla-extensions/tagz