Duplicate Content Explained: Myths, Real Risks and Fixes

On this page

1. The myth
2. The real problems
3. Common sources on business sites
4. How to fix it
5. The principle

"Duplicate content" worries many business owners. The truth is more nuanced: normal technical duplication rarely causes penalties, but some kinds of duplication do hold sites back.

The myth

There's no automatic penalty for having some duplicate text, such as a shared disclaimer, a product described similarly to another, or a quote. Google usually just picks one version to show.

The real problems

• Split ranking signals: links and relevance spread across several URLs for the same content
• Google choosing the wrong version to show in results
• Wasted crawling on large sites with many near-identical pages
• Thin, scaled pages: many near-identical pages created to target keywords (like city-swapped pages) can be treated as spam. See avoiding doorway pages.
• Copied content from other sites adds little value and rarely ranks

Common sources on business sites

• Multiple URL versions (http/https, www/non-www)
• Store filter and sort parameters
• Manufacturer product descriptions used by every retailer
• Service pages with the same text and only the location changed
• Tag and category archives that repeat post excerpts

How to fix it

1. Redirect to one preferred domain version
2. Use canonical tags for necessary duplicates; see canonical tags explained
3. Write unique product and service descriptions
4. Merge near-duplicate pages into one stronger page, with redirects
5. Noindex low-value archives if they add nothing
6. Control filter URLs on stores; see WooCommerce SEO

Not sure which archives count as low-value? See when to index or noindex WordPress category and tag pages.

The principle

Each page should exist for a reason and offer something unique. If two pages would answer the same question, combine them into one better page.