Meta TitleTitle tag exists and is not empty Meta DescriptionMeta description exists and is not empty CanonicalCanonical URL matches current page URL PaginationPrev/Next link tags exist and is not empty HreflangAlternate hreflang tag present and is not empty OG Titleog:title exists and is not empty OG Descriptionog:description exists and is not empty OG Imageog:image is a valid absolute URL Twitter Titletwitter:title exists and is not empty Twitter Descriptiontwitter:description exists and is not empty Twitter Imagetwitter:image is a valid absolute URL

Robots.txtrobots.txt exists and is not blocking current page Meta Robotsmeta robots tag exists and does not include noindex (case-insensitive) X-Robots-TagX-Robots-Tag does not include noindex (case-insensitive) SitemapSitemap link discovered Nofollow LinksAdds a nofollow link for test

Structured DataValid JSON-LD schema present Image EXIF DataSimulates images with EXIF data Video MetadataSimulates Video tag with metadata

HeadingsAt least one H1 present on current page Semantic HTMLExactly one header, nav, main, footer Image Alt & SizeImages have alt and dimensions