Open Graph is a protocol introduced by Facebook in 2010 to allows deeper integration between Facebook and any web page. It allows any web page to have same functionality as any other object on Facebook. You could control how your website is being displayed on Facebook. Now, other social media sites such as Twitter, LinkedIn are recognizing Open Graph meta tags
Use free tool such as OpenGraph.xyz to generate meta tags for your website, and copy the meta tags in the <head> element before the closing </html> tag.
Meta tags are only allowed in the head element. Adding meta tags in the body will result in invalid markup.
Use images that are at least 1080 pixels in width for best display on high resolution devices. Facebook recommends using 1:1 images in your ad creatives for better performance with image link ads.
Facebook Debugger is an open graph debugger service that allows you to check what information Facebook gets from each page on your site.
When someone shared your website on Facebook, Facebook will crawl your website, pull the data and cache it. If you make any changes to your website, use the Facebook Debugger tool to let Facebook scrape the latest information.