What it is
og:url is a meta tag, <meta property="og:url" content="https://yourdomain.com/your-page">, that explicitly tells social platforms the one, official address for the page being shared — similar in spirit to a canonical tag, but specifically for how social platforms record and display shared links, rather than for search engine indexing.
This matters because a page can sometimes be reached through slightly different addresses (with tracking parameters added, or through a redirect), and without this tag, a platform might record the share against whichever exact address was used, rather than the one clean address you'd prefer.
Why it matters
Social platforms like Facebook track engagement (likes, comments, share counts) per URL — if the same page ends up being shared under several slightly different addresses because this tag isn't set, that engagement gets split across multiple versions instead of accumulating on one, understating how much genuine interest a piece of content actually generated. Setting og:url consolidates all of that activity onto the one, correct address regardless of how a particular visitor arrived at or shared the link.
It's a smaller, more technical fix than the title, description, or image tags, but it rounds out a complete, correctly configured social sharing setup.
How to fix it
- Determine the one clean, preferred address for the page (the same one you'd use in a canonical tag, without tracking parameters).
- Add
<meta property="og:url" content="https://yourdomain.com/your-page">to the page's<head>section, using that exact address. - If you're using a website builder or SEO plugin, this is often generated automatically alongside your other Open Graph tags — check your social sharing settings rather than adding it manually if that's available.
- Make sure this matches your canonical tag's address, so both search engines and social platforms agree on the same one official URL for the page.
- Re-run your Launch Readiness check to confirm the tag is now detected.