Social sharing images may display on social networks (like Facebook) or in text messaging applications when you share a URL from your site. While it's optional, adding social sharing images is a good way to influence how social posts linking to your site look, even if the page you're sharing doesn't include images.
There are two types of social images:
Site Social Image: Represents your whole site
Content Social Image: Represents individual pieces of content or pages
How do I add a social image?
Social images can be added in Dashboard > Settings > Search Engine Optimization. Simply, click or drag to upload.
How can I test my social image?
You can use this site to test your social image: heymeta.com
How do I add meta titles and descriptions?