Optimizing your landing page for sharing on social media helps increase traffic and drive sign ups. To optimize your landing page,
Go to Admin Settings > Landing Pages and open your draft landing page.
In the editor, select the Gear icon. This brings up the Landing Page Settings overlay.
Go to the Tracking tab, and scroll down to the <body> tag section
Insert the JS SDK provided by Facebook.
Navigate to the Social Share Settings (Opengraph) tab and fill in the Title, URL, a thumbnail image, and add a short description to the page.