What is Duplicate Content?
Duplicate content exists when identical or very similar content is accessible under multiple URLs. Google must decide which version to index - this can lead to ranking problems. Types: Internal duplicates (e.g., www vs. non-www, HTTP vs. HTTPS, URL parameters), external duplicates (content on multiple domains). Solutions: Set canonical tags, implement 301 redirects, configure URL parameters in Search Console, robots.txt for non-canonical versions, standardize HTTPS and www version. Duplicate content is not a direct penalty but dilutes link equity and can lead to crawl waste.
Key Points
- No direct penalty, but ranking dilution
- Canonical tags as main solution
- 301 redirects for permanent duplicates
- Configure URL parameters in Search Console
- Standardize www/non-www and HTTP/HTTPS
- Regularly check with tools
Practical Example
“Through canonical tags, we solved the duplicate content problem of our product variants.”
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