Thin content
A page that adds nothing a searcher couldn't already get elsewhere. Word count is a symptom, not the definition.
See it
What it is
Thin is about substance, not word count. A 150-word page that answers the question exactly is not thin. A 2,000-word page that restates the current top ten results in fresh sentences is. The test a search engine is applying: if this page vanished, would anyone lose anything.
The usual shapes: auto-generated or paraphrased text, scraped and syndicated copies, doorway pages built for keyword variants, affiliate roundups assembled from a product feed with nothing tested, tag and archive pages holding one item, and programmatic pages where only the city name changes. Google's spam policies call the industrial version 'scaled content abuse', and the helpful content systems judge it site-wide, which is the part that hurts: enough thin pages drag down the good ones next to them.
Gotcha: padding a thin page produces a longer thin page. The fix is usually consolidate into one strong page, or noindex, or delete and redirect. Before rewriting, answer what this page has that nothing else does: original data, a first-hand test, real photos, a tool, or a decision made for the reader.
Ask AI for it
Review these pages for thin content and give me a verdict per URL: keep, merge, or kill. For each one, say what unique value it holds (original data, first-hand testing, own photos, a tool, a clear recommendation) and flag it as thin if the answer is nothing but rephrased common knowledge, feed-generated specs, or a template with one variable swapped. For merges, name the target URL and the redirect. For keeps, list the two or three additions that would make the page worth existing, and do not suggest padding it with more paragraphs of the same.