Keyword Cannibalization is one of the common but often overlooked errors in SEO, making it difficult for your website to achieve high rankings on Google. According to Ahrefs, having multiple pages on the same website competing for the same keywords can reduce traffic and confuse search engines.
So how to detect and fix this error? In this article, RankMarket will guide you how to use Ahrefs to check and fix Keyword Cannibalization errors in a detailed and easy-to-understand way. Let's explore it now!
2. What is Keyword Cannibalization in SEO?
Keyword Cannibalization (also known as “keyword cannibalization”) is a situation where multiple pages on the same website compete with each other to rank for the same keyword or keyword phrase. Instead of focusing SEO power on one main page, these pages “fight” for Google’s attention, leading to poor SEO performance.
Imagine your website as a restaurant, and each page is a dish. If you serve two similar beef pho dishes on the menu, customers (Google) will be confused about which one to choose. The result? Neither dish is a favorite. In SEO, this means that Google cannot determine which page is most important, resulting in low or unstable rankings.
Some signs of Keyword Cannibalization:
- Multiple pages on a website rank for the same keyword, but none of them rank high.
- Keyword rankings fluctuate constantly, for example, today page A ranks high, tomorrow page B surpasses it.
- Traffic from the keyword is scattered across pages, reducing overall effectiveness.
For example, if you have two articles on your website, one titled “How to choose a cheap laptop” and the other “Top 5 cheap laptops 2025”, both targeting the keyword “cheap laptops”, Google may have difficulty deciding which page should rank high more.
3. Consequences of Keyword Cannibalization Error in SEO
Keyword Cannibalization error not only makes you lose the opportunity to reach the top of Google but also causes many serious consequences for SEO strategy. Here are the common consequences:
3.1. Reduced rankings and traffic
When multiple pages compete for the same keyword, Google cannot determine which page is “official”. As a result, all pages have low or fluctuating rankings, leading to a decrease in organic traffic. According to research from Ahrefs, websites with Keyword Cannibalization errors often lose up to 20-30% of potential traffic due to keyword dispersion.
3.2. Dilute SEO Power
Each page on your website needs to be optimized with content, internal links, and backlinks to increase SEO power. However, if you allocate resources to multiple pages targeting the same keyword, the “link juice” (SEO power) will be divided, reducing the effectiveness of each page.
3.3. Confusing users
Keyword cannibalization not only affects Google, but also reduces the user experience. For example, if a user searches for “how to SEO a website” and sees two of your articles with similar content, they may feel confused or think your website is unprofessional.
3.4. Increases the risk of being penalized by Google
While Keyword cannibalization is not an intentional mistake, having multiple pages with duplicate or similar content can cause Google to rate your website as low quality. In extreme cases, you may be affected by the Google Panda algorithm, which targets websites with thin or duplicate content.
3.5. Costly in terms of time and resources
Maintaining multiple pages competing for the same keywords requires you to invest time, effort, and budget in optimizing content, building backlinks, and monitoring performance. This reduces the effectiveness of your overall SEO strategy.
4. How to Diagnose Keyword Cannibalization on Your Site Using Ahrefs
Ahrefs
Ahrefs : Tools to grow your search traffic, research your competitors and monitor your nicheDeliver AhrefsAccess SharedType All-in-one SEO ToolsPlan StandardDetails GB Details
View ProductBefore using Ahrefs to check, you need to determine whether your site actually has Keyword Cannibalization issues. Here are some simple methods to diagnose:
4.1. Using Google Search Syntax
A quick and free way is to use the site:yourwebsite.com “keyword” syntax on Google. For example, if your website is example.com and you want to check for the keyword “Keyword Cannibalization”, enter:
site:ahrefs.com “Keyword Cannibalization”
Google will display all the pages on your website related to this keyword. If you see many pages appearing with similar content, it is a sign of Keyword Cannibalization.
4.2. Check Google Search Console
Google Search Console (GSC) is a free tool that helps you monitor keyword performance. To check:
- Go to Google Search Console > Performance.
- Enter the keyword you suspect is being cannibalized into the Queries bar.
- Switch to the Pages tab to see which URLs are ranking for that keyword.
If multiple URLs appear for the same keyword, check to see if their content is duplicate or competitive.
4.3. Look at your ranking history
If your keyword rankings fluctuate wildly (for example, one page ranks high today but is replaced by another tomorrow), that's a clear sign of Keyword Cannibalization. You can use a tool like Ahrefs Rank Tracker to track your ranking history.
4.4. Check for duplicate content
Use a tool like Copyscape or Siteliner to find pages with similar or duplicate content on your website. Duplicate content is often the main cause of keyword cannibalization.
5. How to use Ahrefs to check for Keyword Cannibalization errors
Ahrefs is one of the most powerful SEO tools today, helping you easily detect and fix Keyword Cannibalization errors. And Ahrefs' Keyword Cannibalization detection feature is Ahrefs Site Explorer. Here are the step-by-step instructions:
Step 1: Enter your website into Site Explorer
- Log in to Ahrefs and go to Site Explorer.
- Enter your website URL (or primary domain, e.g. moz.com) into the search bar, then click the magnifying glass icon.
Step 2: View the Organic Keywords report
- In the Site Explorer interface, scroll down the left menu and select Organic Keywords.
- This report will show a list of all the keywords your website is ranking for. is ranking, along with information about the URL, ranking position, and traffic.
Step 3: Check the ranking graph
- In the keyword list, look in the right column for the graph icon (which looks like a small zigzag line).
- Click the small graph icon next to the keyword to view its ranking history. The graph will show the ranking history for that keyword, with colored lines representing different URLs on the site.
- Look at the graph:
- Sign of no Keyword Cannibalization: There is only one color line (usually blue) that is steady and uninterrupted. This shows that only one URL ranks for that keyword.
- Signs of Keyword Cannibalization: Multiple colored lines appear, intersect, or alternate in ranking. Or there is a gap in the graph, indicating that the website temporarily lost traffic because Google changed the ranking URL. This shows that multiple URLs are competing for the same keyword.
Step 4: Export the report for detailed analysis
- In the Organic Keywords section, click Export to export the keyword list to a CSV file.
- Open the CSV file in Excel or Google Sheets, then sort the keywords column A-Z.
- Filter for duplicate keywords to identify keywords that have multiple URLs ranking for.
Ahrefs also provides a Google Sheets template to automate this process. You can copy the template here and follow the instructions:
- Open the sheet titled “1. Ahrefs KW Export”.
- Select cell A1, click File > Import, then load the exported CSV file from Ahrefs.
- Select the Replace data at selected cell option to import the data.
6. How to Use Ahrefs to Fix Keyword Cannibalization Errors
Detecting errors is the first step, but fixing them is the key to improving SEO performance. Here are methods for using Ahrefs to fix Keyword Cannibalization errors, combined with practical strategies.
Solution 1: 301 Redirect
- Identify the main page (the page that performs best or is most relevant to the keyword).
- Use 301 Redirect to redirect sub-pages to the main page. This helps focus all of your SEO power on a single URL.
- For example, if page A and page B both rank for “cheap laptops,” but page A has better content, redirect page B to page A.
Solution 2: Use Canonical Tags
- If you don’t want to delete or redirect pages, add canonical tags to your subpages to tell Google that the main page is the preferred version.
- How to do it: In the HTML code of the subpage, add the tag:
- Check your canonical tags with Ahrefs Site Audit to make sure they’re set up correctly.
Solution 3: Optimize internal links set
- Use internal links to direct SEO power to the main page. For example, in related articles, link to the main page with keyword-rich anchor text (like “SEO services”).
- Check your internal linking system with Ahrefs Internal Backlinks to make sure there are no links to unwanted subpages.
Solution 4: Consolidate content
- If pages have similar content, consolidate them into one in-depth article. For example, merge the two articles “How to choose a cheap laptop” and “Top 5 cheap laptops 2025” into a single article with the title “Guide to choosing a cheap laptop and top 5 models worth buying 2025”.
- After merging, redirect the old URL to the new URL and update the internal links.
Solution 5: Use the Noindex tag
- For pages that are unnecessary or do not provide SEO value, add the noindex tag to remove them from search results.
- How to do it: Add the following tag to the of the page:
Solution 6: Optimize content and keywords
- Make sure each page targets a single keyword or a related long-tail keyword. For example, instead of using “cheap laptops” for both pages, optimize page A for “cheap laptops under 10 million” and page B for “cheap laptops for students”.
7. Tips to avoid Keyword Cannibalization in the future
- Plan your keywords in detail: Before writing your article, use Ahrefs Keywords Explorer to allocate keywords to each page. For example, create a list of primary and secondary keywords, making sure no keywords are repeated.
- Build a clear website structure: Use Ahrefs Site Audit to check the URL structure and make sure each page serves a specific purpose.
- Monitor regularly: Use Ahrefs Rank Tracker to monitor keyword rankings and detect early signs of Keyword Cannibalization.
8. Conclusion
Keyword Cannibalization is a common SEO mistake but can be completely fixed if you use the right tools and strategies. With Ahrefs, you can not only easily detect pages competing for keywords but also apply solutions such as 301 redirects, canonical tags, or content consolidation to optimize SEO performance. More importantly, careful keyword planning and regular monitoring will help you avoid this mistake in the future.
Start auditing your website today with a cheap Ahrefs account at RankMarket to ensure that each keyword is associated with only one page. If you encounter difficulties during the implementation process, do not hesitate to leave a question or contact us for support. Good luck in bringing your website to the top of Google!
References:
- Keyword Cannibalization: What It (Really) Is & How to Fix It: https://ahrefs.com/blog/keyword-cannibalization/