Open Graph Protocol provides a formatted link using site name, description and image when you share a link on Twitter, Facebook, etc.
This web app generates automatically OGP tags and all you have to do is to paste that.
* you must fill these fields
Open Graph recommends specifying the "og" prefix mapping, no such markup is required for using Twitter card and HTML meta tags.
<head prefix="og: https://ogp.me/ns#">
<!-- Open Graph Protocol -->