Duplicate content

There is no general Google penalty for duplicate content. Most duplication is accidental and technical, such as the same page at several addresses, and Google handles it by picking one version as the canonical and showing that. Penalties apply only when duplication is deceptive, such as copying other sites' content at scale to manipulate rankings.

The real costs are quieter: the search engine may choose the version you did not want, ranking signals get split across copies, and crawlers spend time on repeats instead of new pages.

How it works

When Google finds pages with the same or very similar content, it groups them and selects one canonical based on signals including rel="canonical" tags, redirects, internal links, sitemaps and HTTPS. The others are kept out of results for most searches. Its Page indexing report shows these as duplicates with the canonical it chose.

Common causes are www and non-www versions, HTTP and HTTPS both working, URL parameters, printer-friendly pages, product variants, and boilerplate text copied across location pages. Google does not always treat the original or the oldest version as the canonical; it picks the one its signals favour. Internal links and redirects pointing consistently at one version are what make your preference clear.

Duplication across sites works similarly. When the same text appears on several domains, such as a press release or syndicated article, Google usually shows the version it thinks is most useful or original for each search, which is not always yours. Asking republishers to link back to the original, or to keep their copy out of search with a noindex tag, helps. Short repeated elements such as footers, legal notices and navigation are not a duplicate content problem; search engines recognise them as boilerplate.

Example

A cleaning company creates twenty town pages with identical text and only the town name swapped. Google indexes a few and ignores the rest as duplicates. The company rewrites each page with genuinely local details: areas covered, typical jobs there, travel times and local reviews. More of the pages are indexed and begin appearing for searches in each town.

To check its own site, the company runs a crawler that flags pages with very similar text and identical titles, and reviews Search Console's Page indexing report for duplicate statuses. URL Inspection on a few town pages shows whether Google selected each page as its own canonical or folded it into another. After the rewrite, the same check confirms the town pages are now treated as separate, indexed pages.

Why it matters for your business

Duplicate content can make the wrong page rank or keep useful pages out of results entirely, which matters most for shops with variants and businesses with many location pages. Most technical duplication is fixed once with redirects and canonicals. Copied text, from manufacturers or across your own pages, takes writing effort to fix, and that effort is what makes the pages worth ranking. Before writing, it is worth asking whether each page has enough unique substance to deserve indexing at all; sometimes one strong page beats twenty weak ones.

Common mistakes

• Believing duplicate content always triggers a penalty and panicking over normal technical duplicates.
• Publishing many location pages that differ only by the town name.
• Using manufacturer product descriptions word for word, the same as every other shop.
• Letting the site load on both www and non-www, or HTTP and HTTPS, without redirecting to one version.

Questions people ask

Does Google penalise duplicate content?

Not in general. Google says duplication is common and usually handles it by choosing one version to show. A manual action is reserved for deliberately deceptive duplication, such as scraping other sites to manipulate rankings. The usual effect is filtering, where only one copy appears in results, not a penalty.

How do I find duplicate content on my site?

Check the Page indexing report in Google Search Console for statuses such as Duplicate without user-selected canonical. A site crawler can flag pages with identical titles or very similar text. For copies on other sites, search Google for a distinctive sentence from your page in quotation marks.

What should I do if another site copies my content?

Usually nothing urgent: Google is generally good at identifying the original, especially if your site is established. If a copy outranks you or causes real harm, contact the site owner, then consider a copyright removal request to Google. Strengthening your own page and its links also helps.