I just got an email from Google Search Console that says: Top Warnings (5 maximum) Warnings are suggestions for improvement. Some warnings can enhance your appearance on Search; some warnings can become errors in the future. The following warnings were found on your site: Missing field "mainEntity.suggestedAnswer.url" Missing field "mainEntity.suggestedAnswer.author" Missing field "mainEntity.dateCreated" Missing field "mainEntity.suggestedAnswer.dateCreated" Missing field "mainEntity.author" Is the proposed fix coming soon going to include all these schema designations for better performance in SEO? Or will it just remove some classification to clear the errors? ... View more

Would it be safe to say some default like 1200X800 is a pretty good starting point because it will be saved in many different sizes for each responsive environment? ... View more