The Google Discover Checker reviews practical page elements that often matter when content is being prepared for broader visibility.
That includes image size, preview settings, headline length, structured data, author signals, publish dates, canonical setup, and basic mobile-friendly page elements.
Pages often struggle because supporting signals are weak or incomplete. Common issues include images smaller than 1200px, missing max-image-preview:large, no visible author information, weak headlines, missing structured data, unclear publish dates, or a poor mobile page experience.
In many cases, the content itself may be fine, but the page presentation is missing the signals that make the page easier to evaluate, preview, and trust.
Use images that are 1200px wide or larger, allow large image previews, write clear headlines in a practical range, add Article or similar structured data where appropriate, include author and publish date signals, and make sure the page works well on mobile devices.
After scanning, use the results as a cleanup checklist. Fix the missing basics first, then improve image treatment, headline quality, and structured content signals before rescanning.