HTML / XML / JS, low-level validity (cross-cutting)MediumInferred
Malformed Open Graph/Twitter Card
What it is
Broken social/share metadata.
Why it matters
Poor link previews on social and some AI/share surfaces.
How to fix it
Fix OG/Twitter tags.
Impact
Low-medium. Inferred.
Evidence
Valid social metadata improves shared-link presentation. Google Search Central, Structured data general guidelines