Can Negative Keywords Increase Impression Share?
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Quick answer
Negative keywords can improve Amazon Impression Share by reducing wasted spend on search terms that are unlikely to convert. When irrelevant or low-performing queries are excluded, campaign budget shifts toward more relevant auctions, so the ad has a better chance to appear in impressions that matter. The effect is not a guaranteed jump in rank, but rather a cleaner use of available budget and audience targeting.
Many Amazon advertisers ask this question when low-relevance search terms are eating budget. The short answer is yes—exclusions can shift impression share, but the effect depends on how sharply those terms were dragging down efficiency.
How Negative Keywords Affect Impression Share
Impression share measures how often your ads appear compared with the auctions you were eligible to win. When you add negative keywords, you remove queries that should never have triggered your ad in the first place. That makes the eligible impression set smaller and more relevant.
The result is often a stronger impression share within that refined set, even if total impressions decline. For example, broad and phrase match campaigns tend to capture many loosely related queries. Excluding those queries frees up budget for clicks that are more likely to support your target return.
Where to Apply Negative Keywords
Start in your Amazon Ads search term report. Look for terms with meaningful spend but no orders, or terms with very low conversion compared with the rest of the campaign. These are the queries most likely to be wasting budget and suppressing your ability to compete for better impressions.
One practical way to manage this at scale is to use a tool like Amazon Negative Keyword Tool by Todoza. It can highlight underperforming search terms and suggest cleanup tasks. The tool does not make changes automatically, so your team can review exclusions before they go live.
When This Matters
Negative keyword work is most valuable when a campaign has high impressions but weak sales or a low return on ad spend. If the campaign is already tightly targeted and performance is acceptable, aggressive exclusions may reduce valuable discovery too much.
In those cases, impression share can rise without a matching improvement in sales, because you have simply narrowed the pool. The goal should be to remove clearly irrelevant queries, not all lower-volume terms.
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Related guides
Negative keywords are one part of the broader Amazon Impression Rank vs Impression Share question. Impression share tells you how often you appear for eligible search terms, while impression rank tells you where you land on the page. Managing exclusions helps improve the share side by focusing budget on better-matched impressions, so the two metrics should be reviewed together when evaluating Amazon Ads performance.