Duplicate Content

SEO & GEO

Duplicate content refers to identical or nearly identical content that is accessible under multiple URLs, either on the same domain or on different websites.

Duplicate content often arises unintentionally, for example, when a page is accessible both with and without "www," when product descriptions are copied unchanged from the manufacturer, or when print versions and filter parameters generate their own URLs. Search engines then have to decide which version to prioritize in their index, which can weaken the visibility of the desired page. A canonical tag solves this problem by clearly identifying the preferred URL.

Example: An online shop offers the same product page via three URLs: one normal, one with session parameters, and one as a print view. After setting up a canonical tag on all three versions, Google consolidates the ranking signals on a single URL, and the product's organic visibility increases by approximately 25 percent within six weeks.

Use Google Search Console to check if Google classifies any pages on your domain as duplicates. Consistently use canonical tags, avoid multiple URLs for the same content, and write your own product and category descriptions instead of copying and pasting them.

Back to the glossary