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Optimize your backend keywords with

Sellics automatically prioritizes your backend keywords by relevance, and will format them accordingly to help you optimize your use of the backend search fields.
It will also automatically remove any duplicate keywords that already exist on your product listing page.


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Frequently asked questions


Sonar Index Checker is a free tool provided by Sellics

Why do I need to check if my keywords are being indexed?

Amazon has confirmed Seller Central backend keywords are now limited to 250 bytes. Currently sellers are still able to enter more than 250 characters, i.e. 1000 characters per field. However, if you exceed a total count of 250 bytes in all 5 keyword fields, the keywords will not be indexed at all. You can learn more about these changes here.

These changes should already be live for most sellers and products. In order to see how the new changes may have affected your products, you can use our Sonar Index Checker to check if your backend keywords are still being indexed.

Which keywords should I check using Sonar?

To see if the new changes have been applied to your products, select a couple of keywords from your Seller Central backend search fields that are not present in your product title or bullet points, and run them through the Sonar Index Checker.

What do the status indicators mean?

Indexed: Your product can be displayed in the search results for this keyword because:

  • a) This keyword is indexed in your backend search field, or
  • b) This keyword exists on your product detail page, or
  • c) Amazon thinks it is relevant to your product (e.g. the keyword is the name of your product’s category).

Not Indexed: Your product is not indexed for this keyword, meaning it can not be found in the search results.

Not Indexed: This keyword is not indexed but found in your backend search fields: This keyword is not being indexed by Amazon, meaning your product will NOT be displayed in Amazon's search results for this keyword. One reason could be that you have exceeded the 250 bytes limitation prescribed by Amazon.

What should I do if my backend keywords are not being indexed?

If your backend keywords are not being indexed, you may be losing out on highly relevant organic traffic. Make sure your backend keywords stay within the 250 bytes limitation prescribed by Amazon. Delete all keywords in your backend search fields that already exist in your product title or bullet points, as keyword repetition will not help to rank your product higher in search results. If you have to eliminate many keywords in order to comply with the new limit, you may want to prioritize your keywords based on search volume.

After you've made the necessary changes to stay within the 250 bytes limitation, you can use the Sonar Index Checker to verify that your backend keywords are now being indexed by Amazon.

How can I optimize my backend keywords to improve product rankings?

You can use the backend keyword field template in Sellics, our All-in-One tool for Amazon sellers.

Sellics automatically prioritizes your backend keywords by relevance, and will format them accordingly to help you optimize your use of the backend search fields. Sellics will also automatically remove any duplicate keywords that already exist on your product listing page.

Sign up for a free 14 day trial here.

How accurate are the results?

We have thoroughly tested the Sonar Index Checker on various Amazon marketplaces. However, we cannot guarantee the validity of every result.

If you want to manually check if your backend keywords are being indexed, you can enter a keyword that only you will rank for in your backend keyword fields (e.g. 'KeywordTest') then wait for 20 minutes, and look up that keyword on Amazon. If your product shows up, your backend keyword is being indexed. If the search returns no results, your product is not indexed for this keyword, and likely not indexed for any other backend keywords.

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