Thin content is a page with little unique or substantive value to offer a reader — often short, generic, duplicated from elsewhere, or auto-generated without real depth on the topic it claims to cover.
"Thin" isn't strictly about word count, though very short pages are more likely to qualify — a page can be lengthy and still be thin if it's padded, repetitive, or doesn't genuinely add anything beyond what's freely available elsewhere. Conversely, a short page that fully and uniquely answers a specific, narrow question isn't automatically thin just because it's brief. Common sources of thin content include doorway pages built with minor variations purely to target slightly different keywords, auto-generated or scraped text with no real editorial value added, and near-duplicate pages that exist mainly to pad out a site's page count. Google has explicitly named thin content with little added value as a quality issue it aims to rank lower, and it's specifically listed as one of the possible causes behind a manual action in Search Console.
Thin content doesn't just fail to rank well on its own — a site with a significant proportion of thin pages can face broader quality concerns across the whole domain, making it worth periodically auditing and either substantially improving or removing pages that don't genuinely add value.
Not necessarily — length alone isn't the defining factor. A concise page that fully and uniquely answers a specific question can be perfectly adequate, while a long page that's padded or adds nothing genuinely new can still be thin.
It's specifically listed among the possible reasons for a manual action related to "thin content with little or no added value" in Google's own guidelines, particularly when it's widespread across a site rather than an isolated page.
Either substantially expand and improve them with genuine, unique value, consolidate several thin pages into one stronger page, or remove them (with a redirect if they had any traffic or links) if they're not worth saving.
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