There are basically two debuggers: Open Graph Object Debugger and Facebook Sharing Debugger.
What is Facebook Open Graph Object Debugger
What is Facebook Sharing DebuggerFacebook Sharing Debugger fetch posts from their website and blogs and show how they will be displayed in Facebook when other share it.. This debugger tool gave control to webmasters to redefine how their posts, images, quotes, links are shared and displayed in Facebook.
What is the Use of Facebook Open Graph Object Debugger
What Are Open Graph Meta Tags
What Are Essential Meta Tags for posts for Facebook
<!-- Open Graph data -->
<meta property="og:title" content="Title Here" />
<meta property="og:type" content="article" />
<meta property="og:url" content="http://www.example.com/" />
<meta property="og:image" content="http://example.com/image.jpg" />
<meta property="og:description" content="Description Here" />
How to Use Facebook Sharing Debugger Tool Facebook for Developers
If Facebook debugger tool still fetches previous data, use the below URL and paste in the browser. Change the URL of your article and press enter.
This will consider your post as new and fetch new data. Kindly check if your post is having the original URL and not a 301 redirect.
Preview of Posts In FacebookWhen clicked the "Fetch New Scrape Information", 'Facebook debugger' tool will fetch new tags and information and display a preview of the post of how it is going to appear in facebook. The debugger tool will shows you details of the post such as Time Scraped, Response Code, Fetched URL, Server IP, Graph API, redirects and raw meta tags.
Open Graph properties will appear like this.
A Preview is what users will see when they share the URL.
How to Use Facebook Debugger to Fix Sharing on Facebook
Kindly spend 5 seconds to share this post