Why does identical content index on one domain and not another?
- Published November 6, 2026
- Linked from 1 answer
- In a cluster of 51
Because when the same content exists on two sites, Google can treat the copies as duplicates and generally shows one of them for a given search, though in some searches both can appear. Google’s canonicalization documentation describes the purpose as showing only one version of duplicate content in search results. The copy that loses is not penalized and not necessarily judged worse; it is represented by the other one. Google has not published how it chooses between copies on different domains, so “the stronger domain always wins” is a guess, not a rule.
What you can see from the outside
The parts of the choice you can check are the ones Google documents for duplicates in general and the ones that differ between the two sites:
| Factor | What to check |
|---|---|
| Canonical and redirect signals | Does either copy declare the other as canonical, or redirect to it? Google treats both as strong signals |
| Indexing rules | Does either copy carry a noindex, or sit behind a robots.txt block? |
| Discoverability | Is your copy linked from your own pages and listed in your sitemap, or only reachable through a feed? |
| Timing | Which copy did Google find first? |
| Differences around the content | Does one copy add a summary, data, or commentary that makes it a different page? |
| The site itself | Is your site crawled often, does it respond fast, does it already have indexed pages on the same topic? |
On a new site, the last row matters more than it might seem. Google crawls a site within the capacity its server supports and in proportion to how much it wants to crawl it, so a site with few indexed pages and few links pointing in gives Google fewer paths and fewer reasons to visit. Your copy may simply not have been crawled when the other one was chosen.
Situations behind it
- You syndicated the article and the partner’s copy is the one shown. Google’s May 2023 guidance on syndication points to the partner keeping its copy out of the index; the details are in whether syndicated copies should canonical back to you.
- Your content was scraped, and the copy appeared on another site. Copying without permission is a copyright matter, handled through a legal request rather than through changes to your own pages.
- You run two sites with the same content, such as a staging site that is publicly reachable or a second brand domain. Choose one as the home for the content and redirect or canonicalize the other.
Check which canonical Google chose
Inspect your URL in Search Console and see which canonical Google selected. If Google names the other domain’s URL, the content is being treated as a duplicate of it. The fixes that change that are to make your page the version Google is asked to show, through the agreement with the other site, or to make your page different enough that it is no longer a duplicate.
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