What is duplicate content?
SEO Definition and Examples
Duplicate content occurs when the same or very similar text exists on multiple URLs — on the same site or different ones — confusing Google about which to rank.
Full Definition: What is duplicate content
Duplicate content exists when substantial blocks of identical or very similar text appear at multiple web addresses. Internal types: paginated category pages (page/2, page/3), product filters with the same content, parameter URLs (product?sort=price), http vs https or www vs non-www versions. External types: content copied from other sites or distributed across several of your own domains without canonicalization. Google tries to pick a canonical version — and may choose wrong.
Why Does Duplicate Content Matter for SEO?
Internal duplicate content dilutes ranking authority across versions instead of consolidating it. Externally, copied content can be penalized. The solution: correctly configured canonical tags, 301 redirects and creating unique content per page.
Source: Google Search Central — Duplicate ContentFrequently Asked Questions about Duplicate Content
Related Terms
Canonical Tag
IntermediateThe canonical tag (rel="canonical") tells Google the main version of a page when similar or duplicate URLs exist, preventing duplicate-content penalties.
Technical SEO
AdvancedTechnical SEO covers your site's infrastructure — crawlability, indexing, loading speed, HTTPS and data structure — that lets Google find and understand pages.
Robots.txt
IntermediateRobots.txt is a text file placed at the root of a site that tells crawlers (Google, Bing, GPTBot) which pages they may or may not access and index.
Crawlability
IntermediateCrawlability is the ability of Google's robots to access, navigate and read your site's pages — an essential prerequisite for indexing and ranking.
Put Duplicate Content into practice
Explore how to apply this concept to your industry and city.
