What is duplicate content?
SEO Definition and Examples
Duplicate content = the same (or very similar) content on multiple URLs. Google penalizes pages with internal and external duplicate content.
Full Definition: What is duplicate content
Duplicate content = the same text (40%+ similarity) appears on 2+ different URLs, internal to your site or on other sites. Types: (1) Internal duplicate: /article and /article/ (with a trailing slash); (2) Similar-content pages (e.g. a short article + the long version); (3) Content distribution: publishing across multiple domains (syndication). Google has to choose which canonical URL to rank — the others are devalued. Penalties: poor ranking, authority split across URLs, crawl budget wasted on duplicates. Fix: use canonical tags, 301 redirects, unique content per URL.
Why Does Duplicate Content Matter for SEO?
Duplicate content = poor ranking and split traffic. Two pages with the same content rank at 1/10 the value of a single unique URL. 100 unique articles rank much better than 50 unique + 50 re-published.
Source: Google — Duplicate ContentFrequently Asked Questions about Duplicate Content
Related Terms
Technical SEO
AdvancedTechnical SEO covers your site's infrastructure — crawlability, indexing, loading speed, HTTPS and data structure — that lets Google find and understand pages.
Canonical URL
IntermediateA canonical URL is the rel="canonical" attribute that tells Google the "true" version of a page when duplicate versions exist (e.g. with and without www).
Hreflang
AdvancedHreflang is an HTML tag that tells Google which language or regional versions of a page exist, avoiding duplicate-content penalties for multilingual sites.
Google Indexing
BeginnerGoogle indexing is the process by which Google adds web pages to its index after crawling them, making them eligible to appear in search results.
Put Duplicate Content into practice
Explore how to apply this concept to your industry and city.
