Open Graph tags missing issue means that website has pages without Open Graph tags.
The importance of the issue
Open Graph formatting allows to display your social media content in an attractive manner. This allows for generating more traffic from social media, as well as making your posts look more professional.
How to check the issue
Using any browser is enough to check the issue. Open the source code of the flawed page To do this, click the right mouse button at any spot of the page and choose “browse the code” option, or apply an online tool Codebeautify.
The source code must contain OpenGraph microdata.
URLs where Open Graph tags are missing analysis is not enough to optimize your site for search engines!
Make a full audit to find out and fix your technical SEO in order to improve your SERP results.
How to fix this issue
Open Graph microdata are generated in the site template. You need to add microdata in the template. For popular CMS you can use plugins generating Open Graph automatically.
Detect pages where Open Graph tags are missing
Crawl the site to collect all pages that have no Open Graph tags