Errors list:
Empty body
Not empty body
Large page size
Not large page size
Charset empty
Charset exist
Charset missing
Charset many tags exist
Markup Schema.org exist all attributes
Markup Schema.org exist not all attributes
Markup Schema.org is missing
Markup OpenGraph exist all attributes
Markup OpenGraph exist not all attributes
Markup OpenGraph is missing
Markup Twitter Card exist all attributes
Markup Twitter Card exist not all attributes
Markup Twitter Card is missing
Depends on domain (hardcoded domain in urls)
Different links
External links without nofollow
External links with nofollow
Internal links with nofollow
Internal links without nofollow