Properties including og:title, og:type, og:image and og:url describe the shared object. Use information that accurately represents the page rather than an unrelated image or exaggerated title.
Image dimensions and alternative descriptions can be provided. Check the receiving platform’s aspect-ratio and file limits; a 20-percent image-text limit is not a universal Open Graph requirement.
Check the metadata returned by the server, image accessibility and the actual preview. Platform caching may delay visible updates, so verify the result after changes.