Definition

Duplicate content is substantially similar content accessible at multiple URLs — causing search engines to choose one canonical version and potentially dilute ranking signals.

Detailed Explanation

Causes: www vs non-www, HTTP vs HTTPS, URL parameters, printer-friendly pages, scraped syndication, paginated archives.

Fix with canonical tags, 301 redirects, and consistent internal linking to the preferred URL. (Search Console’s old URL Parameters tool was retired in 2022.)

Nepal Context

Nepali news and blog sites often syndicate identical press releases across domains — canonical back to source or rewrite with unique angle. E-commerce sites duplicate product descriptions from suppliers — add unique specs and Nepali-language copy.

Practical Examples

  • The same product is reachable at /shoes/red-sneaker and /sale/red-sneaker; a canonical tag points both to one URL.
  • A press release is copied word for word on five news portals; the original publisher’s version usually ranks and the copies add little.
  • Printer-friendly versions of articles are noindexed or canonicalised to the main page.

How to Check It

  1. Use URL Inspection to see the “Google-selected canonical”; if it differs from yours, Google treats the pages as duplicates.
  2. The Pages report reason “Duplicate without user-selected canonical” lists affected URLs.
  3. Search for a distinctive sentence from the page in quotes to find copies elsewhere.

Key Takeaways

  • Same content, multiple URLs — wastes crawl budget
  • Canonical tag signals preferred version
  • Not a “penalty” — Google consolidates signals to one URL

Common Mistakes

  1. No canonical on paginated or filtered URLs
  2. Syndicating content without canonical or rewrite
  3. Both www and non-www indexed without redirect