About website metadata / open graph preview
The checker reads a page's title, description and Open Graph tags and shows how a shared link will look on social networks and messaging apps.
What to review
- A unique title and a clear description.
- An og:image of about 1200 × 630 pixels.
- A canonical URL.
Sharing caches
Networks cache previews. After a change, use their debugger tools to refresh the preview.
A worked example
A blog post may show a title of 48 characters, a description of 140 characters and an og:image of 1200 × 630 pixels. If og:image is missing, social networks pick a random image or none, so shared links look plain and get fewer clicks.
Quick checklist
- Title and description present and unique.
- A canonical link and a valid og:url.
- Twitter card tags, even if they only duplicate the Open Graph ones.
After you fix tags
Social networks cache link previews. Use each platform's debugger to refresh the cache after you change an image or a title.
