How to Use Negative Keywords in Amazon Ads Strategy

Managing an Amazon advertising account often involves reviewing search term reports to identify high-cost, low-conversion queries. If you notice a specific word or phrase consistently consuming your budget without resulting in orders, that term is a candidate for negative keyword placement. In a typical account, this process helps maintain a healthy ACOS by pruning the waste from your campaigns. When you add a term as a negative keyword, the Amazon algorithm stops showing your ads for that specific search, which helps refine the traffic reaching your product detail pages.

This strategy is especially helpful for brands selling generic items or products that are often confused with similar items in different categories. For example, if you sell premium stainless steel coffee mugs, your ads might accidentally show up for queries like ‘plastic disposable coffee cups.’ By adding ‘plastic’ and ‘disposable’ as negative phrase matches, you can immediately stop this irrelevant traffic. This simple action directs your advertising dollars toward shoppers actively looking for the quality material you actually offer, rather than bargain-hunting for cheap alternatives.

Amazon offers two primary ways to exclude search terms from your campaigns. Understanding the distinction between these two is essential for maintaining control over your ad spend. Negative exact match and negative phrase match are the tools provided to manage your exclusions effectively. Each type serves a distinct purpose depending on how broad you want your exclusion to be. Using them correctly prevents ads from displaying when buyers search for specified non-converting search terms.

• Negative exact match: This hides your ad only when a customer searches for the exact phrase you specify. Use this when you want to block a very specific term but still want to show up for variations that might be relevant.
• Negative phrase match: This hides your ad when a customer searches for any query containing your specified phrase. This is a broader block that is useful for removing entire categories of irrelevant traffic from your ads.

Identifying the right keywords to negate requires a consistent review of your Search Term Reports. You should download these reports from your advertising dashboard on a weekly or bi-weekly basis to spot trends. A common pattern is finding keywords that have high impressions but zero sales over a significant period. These terms are often the first candidates for exclusion because they represent a clear drain on your resources without providing any benefit to your sales volume.

Another common scenario is brand protection and thematic filtering. If your product is not compatible with a specific accessory or if you want to avoid appearing on competitor brand names that do not convert well, you can proactively add these terms. By keeping a running list of these terms, you can ensure your campaigns stay focused on your core audience. Remember that the goal is to improve the efficiency of your spend, so be selective when adding negative keywords to avoid accidentally blocking traffic that could eventually convert.

It is tempting to block any term that has not converted in a few clicks, but this can be a mistake. Advertising on Amazon relies on data gathering, and sometimes a keyword needs more time to prove its value. If you block terms too early, you might lose out on potential customers who are simply in the research phase of their buying journey. A keyword that does not convert today might be part of a larger, successful search path for a future sale.

Always consider the volume of the search term before applying a negative match. If a term has only received one or two clicks, it is usually not enough data to make a permanent decision. Check your conversion thresholds and allow for a reasonable window of time before deciding to exclude a term. A conservative approach ensures that you do not inadvertently limit your reach for terms that have the potential to drive sales once your product listing is better optimized or your pricing is adjusted.

At Alien Road, we follow a systematic process for managing negative keywords in our client campaigns. Our team begins by performing a deep audit of current search term reports to identify high-spending, low-converting queries. We categorize these into ‘clear waste’—terms that are obviously irrelevant—and ‘borderline terms’ that require further monitoring. For example, we might find that a high-end furniture brand is paying for clicks on ‘cheap’ or ‘DIY’ related terms. We immediately move these into a negative phrase match list to protect the budget.

Once the initial audit is complete, we set up a recurring schedule for review. Our practitioners check the performance of these excluded terms monthly to see if any market trends have changed the search intent. We also ensure that our negative keyword lists are applied at the campaign or ad group level as needed. This allows for granular control, ensuring that we only block terms that are truly detrimental to the specific product being advertised, while keeping other campaigns open to broader discovery.

Reducing your ACOS is often the primary motivation for implementing a negative keyword strategy. By eliminating the budget spent on irrelevant clicks, your remaining spend is allocated to higher-performing search terms. This shift naturally improves your overall campaign efficiency. As you remove the noise from your search term reports, you will find that your ads appear more frequently in front of users who are actually searching for the specific benefits your product offers.

However, keep in mind that ACOS is not the only metric that matters. While reducing waste is essential, you must also monitor your total sales volume. Sometimes, aggressive use of negative keywords can lead to a drop in total impressions and sales if you are too restrictive. The goal is to reach a balance where you are spending efficiently on the right terms while maintaining enough reach to keep your products visible in a competitive environment. Monitor the relationship between your spend, clicks, and conversion rate after applying new exclusions.

Implementing your negative keyword list is a straightforward process within the Amazon Ads dashboard. Follow these steps to ensure you are applying them correctly and effectively to your campaigns:

• Go to your advertising campaign manager and select the campaign you wish to edit.
• Click on the ‘Negative keywords’ tab located in the side navigation menu.
• Select ‘Add negative keywords’ and choose between ‘Negative exact’ or ‘Negative phrase’.
• Enter your list of terms, ensuring each one is placed on a separate line.
• Save your changes and monitor the impact on your campaign performance over the next seven days.

You should start by downloading your Search Term Report for the past 30 days. Sort the data by ‘Spend’ and look for any terms that have spent more than double your target CPA without a single sale. Before adding these to a negative list, verify that the intent is truly irrelevant to your product. Once confirmed, add them as negative exact matches if you want to be precise, or negative phrase matches if you want to block the entire concept.

Consistency is the key to maintaining a clean account. Set a recurring calendar reminder to perform this cleanup every two weeks. By making this a part of your standard account maintenance, you prevent budget waste from accumulating and keep your Amazon advertising performance consistent. You can also review your campaign structure to see if you should move these negative keywords to a campaign-level list for broader impact across all your ad groups.

Keep reading: Amazon Ads · Amazon