Low impact · weight 2 · worth up to 0.6 points of the total score
Without a card type, X renders a shared link as plain text even when Open Graph tags exist. It is one line of markup that decides whether the share carries an image.
Add <meta name="twitter:card" content="summary_large_image"> alongside the Open Graph tags.
Check a page for this, and the other 41 checks at once
URL is short and readable
Long parameter-laden URLs get truncated in results, are harder to share, and multiply into near-duplicate variants of the same page.
Page is not blocked by a robots meta tag
A noindex directive removes the page from search entirely. It is the most damaging single line on a page, and it is nearly always left behind by accident after a staging deploy.
Page has a title
The <title> element is the headline Google shows in search results and the label the browser puts on the tab. A page without one is listed under a machine-picked fallback that nobody chose.
No noindex in the X-Robots-Tag header
X-Robots-Tag does the same job as the robots meta tag but travels in the HTTP response, so it is invisible in the page source. A page can look perfectly indexable while the server quietly forbids it.
