Every seller on the Amazon platform is looking to achieve the best possible optimization for their listings. They aim to outperform their top competitors and get to the highest organic rankings. For this purpose, learning how to use Backend Keywords is a must.
However, there are several things to keep in mind before including Backend Keywords in your listings. For example, many beginner sellers are unaware that the backend plays a crucial role in search engine indexing. And there’s much more.
Read this article to learn the basics of Backend Keywords with a set of best practices that will help you avoid performance-killing mistakes.
The Foundation of SEO on Amazon
Before improving backend keywords, it is important to understand these three connected concepts about the A9 algorithm:
Indexing
Indexing is the basic requirement of the A10 algorithm. When Amazon indexes your listing for a keyword, it recognizes your product as relevant for that search. Think of indexing as your entry in the Amazon library. Without indexing, your product does not appear in search results for that term.
Ranking
After indexing comes ranking. Ranking determines how high you appear in the search results. Many factors influence ranking. These include conversion, price, images, reviews, delivery speed, and listing quality. You cannot rank if you are not indexed first.
Discoverability
Discoverability is the ability of customers to find your product easily. It includes search visibility, recommendations, related products, and category placement. Backend keywords support discoverability because they broaden the range of searches where Amazon sees your product as relevant.
Backend keywords do not guarantee sales. They do give Amazon better signals. Strong signals lead to better indexing, which then affects ranking and discoverability.
What are Backend Keywords?
Let’s start with the basics. Backend keywords are hidden search terms inside the Amazon listing. Shoppers do not see them; they’re invisible.
Their importance comes from the fact that Amazon uses them to understand what your product is about and to match your listing with more search queries. They work in the background all the time.
How are Backend Keywords different from Normal Keywords?
Normal keywords are visible. They appear in your title, bullets, and product description. Those help both the shopper and the algorithm fins and understand your product better. Because of this, normal keywords must:
- Read naturally
- Complement with branding
- Be competitive in your niche
Backend keywords help only the algorithm. They do not help the shopper because customers never see them. Unlike normal keywords, these can be raw terms with no punctuation.
They allow you to target additional search terms without needing to modify your copy. And they play a crucial role in search engine indexing.
How to Collect Relevant Backend Keywords
Use your regular Keyword Research tool, like Helium 10 or DataDive. Then, once you have the results of your research, look for words that are:
- Related to your product, but not completely accurate. For example, if you were selling chocolate chip cookies, “crackers” would be a perfect backend keyword.
- Typos with high Search Volume.
- Relevant keywords in foreign languages with high Search Volume.
Here’s what keyword research looks like from inside the DataDive tool:
In the screenshot above, you can see the results of a NicheDive run with the DataDive tool. We selected the 15 top organic competitors to the product we were optimizing (soda crackers) and narrowed them down to the top four.
As you can see, these four competitors are highly optimized and are ranking well in pretty much every search term with high Search Volume.
Then, in the list of Search Terms, there’s a variety of keywords. Some of them are basic musts like “crackers”, which has the greatest SV out of them all. Meanwhile, others should be excluded from any part of the listing, even the backend. We’re talking about competitor keywords. Example on the list: “365 crackers”.
The rest of them… you guessed it. Those are Backend Keywords. Examples: “galletas saladas”, “craxkers” or “crakers”.
Here’s how the results of the research look like after categorizing each keyword and then filtering them in a Google Sheets doc:
See how most of them are related to the product but could not be included to the visible side of the listing? That’s precisely what you’re looking for.
Backend Keywords Formatting Rules
You need to know that Backend Keywords require specific formatting rules you’re not allowed to miss before you introduce them to your listing in Seller Central:
There’s a byte limit
This is the most important rule. The limit is 250 bytes, not 250 characters.
If you pass the limit, Amazon can ignore the entire field.
Always place your highest value terms first.
Use a free byte counter whenever possible.
Commas are not allowed
Do not separate each backend keyword with commas. Commas consume bytes and can interrupt indexing.
Correct format:
“Cutlery stainless steel spoon fork knife”
Incorrect:
“Cutlery, stainless steel, spoon, fork, knife”
Don’t use repeated words
If a keyword is already in your title or bullets, Amazon has already indexed it. Use backend space only for additional terms, long tail phrases, misspellings, and alternative names.
Example of wasted space:
“running shoes, men’s running shoes, athletic shoes”
Efficient version:
“running shoes mens athletic sports”
This means that Amazon automatically indexes both singular and plural versions of a word. The algorithm treats common singular–plural variations the same because it recognizes the word stem.
Example:
If you add “fork”, you will also index for “forks”. So exclude “forks” if you have it in your list.
There are exceptions when the plural form is entirely different from the singular form of a word. For example: “child” vs. “children”.
How to include Backend Keywords into your listing
Adding backend keywords to your listing is simple once you know where to find the fields inside Seller Central.
In the “Manage Inventory” section within Seller Central, find the product you want to optimize and click Edit. Then, scroll down the Product Details tab and locate the field called “Generic Keywords”. This is your main backend keyword field.
Some categories also include Subject Matter, Other Attributes, Target Audience, and Intended Use. All of these help with indexing.
Before typing anything into Seller Central, prepare your keyword set outside the platform. This makes it easier to measure bytes and avoid repetition.
A complete backend list should include:
- Keywords you did not include in your title, bullets, or description
- Long tail variations
- Synonyms
- Irregular plural versions of words when needed
- Search terms with real volume that do not fit naturally in your visible copy
- Spelling variations
- Spanish or bilingual variations when relevant to your market
Avoid common mistakes by excluding:
- Brand names
- Competitor trademarks
- Words you already used in the frontend
- Special characters
- Repeated keywords
Once you save the changes made to your listing, Amazon needs time to recognize your keywords. Your listing will usually update within a few hours, though sometimes it can take longer, up to a day.
Conclusion
Backend keywords are a small part of the listing, yet they have a direct impact on indexing, ranking, and overall visibility. Always remember to follow the correct formatting rules and select only meaningful terms.
Having a competitor keyword in there can be very harmful, though the solution is quick and easy. You just have to remove the keyword and yourlisting will be back on track.
Backend optimization is not complicated, but it does require precision when categorizing each keyword. As long as you do this minute, ant-like work with attention to detail, you’ll be setting the foundations for great listing optimization, which leads to higher visibility and conversions.
Frequently Asked Questions (FAQs)
What are backend keywords in Amazon?
Backend keywords are hidden search terms added inside Seller Central that Amazon uses to understand what your product is about and to match your listing with more search queries.
Do backend keywords affect ranking?
Yes. Backend keywords influence indexing, which is the first requirement for ranking. If your listing is not indexed for a keyword, it cannot rank for that search term.
Do I need to include both singular and plural versions of a keyword?
Only when the plural form is irregular. For common plurals like “spoon” and “spoons,” Amazon indexes both automatically.
What type of keywords belong in the backend?
Terms that do not fit naturally in your title or bullets. Examples include long tail variations, synonyms, typos, bilingual terms, and related search terms with real traffic.
Can backend keywords fix a poorly optimized listing?
Backend keywords help indexing, but they cannot replace a strong title, bullets, and images. They should be used as support, not as a primary SEO strategy.
Ready to Strengthen Your Visibility on Amazon?
Most sellers focus on titles, images, and price. Very few understand how much power lies within backend keywords. When you optimize these fields correctly, Amazon understands your product faster, indexes you for more searches, and rewards you with stronger visibility.
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