GLOSSARY TERM
Duplicate content
Multiple URLs with the same or very similar content.
Updated June 2026
What it means
Pages whose content substantially matches other URLs, on your site or elsewhere.
Why it matters for indexing
Google collapses duplicates and indexes only one — the others appear “not indexed”.
How to check it
Search a unique sentence in quotes on Google, or use the URL Inspection tool to see the chosen canonical.
How FastIndexing helps
Pre-flight detects duplicate/canonical clusters so you submit the one URL that should actually rank.
Frequently asked questions
What is duplicate content?
Duplicate content is the same or very similar content on multiple URLs, on your site or across sites. Google indexes one and treats the rest as duplicates.
How do I fix duplicate content?
Set a rel="canonical" to the preferred URL, or 301-redirect duplicates. Pick one indexable version per piece of content.