Fix search engine page indexing and structured data issues #73
Description
See Google Search Console for details.
Page indexing issues detected in readup.org:
- Duplicate without user-selected canonical
- Page with redirect
- Excluded by ‘noindex’ tag
- Soft 404
- Server error (5xx)
Review snippets structured data issues detected in readup.org:
- Invalid object type for field "itemReviewed"
- Missing field "ratingValue"
- Value in property "ratingCount" must be positive
- Value in property "reviewCount" must be positive