HTML / XML / JS, low-level validity (cross-cutting)HighInferred
Multiple head/body elements
A document should have exactly one head and one body. Duplicates confuse parsing and can cause tags to be ignored or content to be misplaced.
What it is
Duplicate structural elements.
Why it matters
Can truncate the head, dropping directives/canonicals.
How to fix it
Ensure one head and one body.
How to find it on your site
- View source and check for more than one head or body element.
- Find the template or includes producing duplicates.
- Consolidate to a single head and body.
- Re-validate.
Cross-reference to ranking and citation factors
Duplicate structural elements can break parsing and drop important tags. One head and one body keeps the document sound.
Impact
Medium-high; silent failures. Inferred.
Evidence
Head integrity affects directive processing. Google Search Central, Robots Meta Tags Specifications; Google Search Central, Consolidate duplicate URLs (canonicalization)
Sources