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Open Graph protocol enables any web page to become a rich object in a social graph. Open Graph Tags are snippets of text that are used to communicate a page's content with social media (such as Facebook and Twitter). It allows integration of your site and socialmedia and tells what content shows up when you share a page on socialmedia.
If you have implemented Open Graph tags in your website and you want to check them. You can use the Open Graph checker tool; enter the URL of the website you want the open graph checker tool to check. It will run a check and if it finds the tags it will display them. In case it does not find any tags it will display a message.
You can use this tool before and after you implement Open Graph tags in the HTML Header code of your website. You can also use this tool to check on your competitors websites and see the tags that they are using. If your competitor’s site is getting more traffic than your site and you find graph tags in it, you will know the advantage they have over your website.