Why it matters
Hidden text is against Google's spam policies, and sites that violate them may rank lower or not appear at all. Said at Search Central Live: Google records spam metadata such as white-on-white text with a page's tokens, so leftover hidden keyword blocks are a liability rather than neutral clutter.
How to meet it
Remove hidden keyword blocks, text in the background colour and text positioned off-screen for search engines. Legitimately hidden interface content (tabs, accordions, screen-reader-only labels) is fine.
How to test it
A crawl with a style check finds no text whose colour matches its background and no off-screen or display:none blocks outside accessibility helpers and UI components.
How Regensbot covers it
Regensbot proposes a verdict with the evidence; a person on your team confirms it.
The evidence comes from rendering your pages in headless Chromium.
Headless Chromium renders the page on an isolated render service, and the raw and the rendered HTML run through the same parsers.
Sources
Google documents01
Claims in the knowledge base03
- D2-C324UndocumentedUnderstanding what's on a pageSaid on stage
- D2-C343n/aUnderstanding what's on a pageThe author's interpretation
- D2-C667SourceCalculating (some) signalsGoogle's documentation
Claim IDs refer to the Search Central Live 2026 knowledge base. The knowledge base (opens in a new tab)
- Undocumented
- Said or shown at the event, not in the documentation.
- Source
- The claim is the cited document itself.
- n/a
- Nothing to verify: a quotation, framing, opinion or analysis.