Structured data, viewport, and language
Structured data can unlock rich results where Google supports them. The viewport meta tag supports responsive rendering. The lang attribute on <html> states the document language for accessibility and language targeting.
What we look for
- Presence of structured data (for example JSON-LD) on the page.
- Viewport meta for typical responsive setups.
- A declared language on the root element.
What to do
Add appropriate schema types for your content. Include a viewport meta for mobile-friendly layouts. Set lang (and hreflang where you manage multiple locales) consistently with your content.
Technical details
We detect presence of structured data types at a high level; deep schema validation is out of scope for this layer. See On-page and technical signals.