TL;DR

Negative keywords tell Google Ads 'don't show my ad for this search.' They prevent wasted spend on irrelevant queries. For example, selling premium coffee gear means excluding 'free' and 'cheap' searches.

Key Points

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Negative keywords exist in paid search (Google Ads) — they have no direct equivalent in organic SEO, though related concepts apply

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Three match types apply to negative keywords: negative broad, negative phrase, and negative exact — controlling how strictly the exclusion applies

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Without negative keywords, broad match keyword campaigns can bleed budget on completely unrelated searches

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Regular search term report reviews reveal unexpected queries triggering ads, which then become new negative keywords

Why Negative Keywords Matter

In Google Ads, broad match keywords can trigger ads for a wide variety of related searches — many of which may be irrelevant to your business^[1]. A plumber running ads for 'pipe repair' might have their ads trigger for 'DIY pipe repair YouTube tutorials' — searches from people with no intention of hiring a plumber. Negative keywords prevent this by explicitly excluding terms. The financial impact is direct: every irrelevant click costs money without converting. More subtly, a high rate of irrelevant clicks hurts Quality Score, which in turn raises cost-per-click for all keywords in the campaign. Building a robust negative keyword list is one of the highest-ROI optimization tasks for any paid search campaign.

Match Types for Negative Keywords

Negative keywords work differently from positive keywords in terms of match types^[1]^[2]. Negative broad match excludes searches containing the keyword in any order alongside other terms. Negative phrase match excludes searches containing the exact phrase. Negative exact match only excludes the precise search query. For example, if you add 'free' as a negative broad match, your ad won't show for 'free keyword research tool' or 'keyword research tool free trial.' If you add it as negative phrase match, it only excludes searches where 'free' appears as a connected phrase. Choose match types based on how broad your exclusions need to be — negative exact is safer but requires more individual additions.

Building a Negative Keyword List

Start with obvious irrelevant terms before a campaign launches: 'free,' 'DIY,' 'how to,' 'jobs,' 'salary,' 'tutorial,' 'Wikipedia' — depending on your product^[2]. Review the Search Terms report in Google Ads weekly for the first month of a new campaign; actual search queries that triggered your ads but weren't a match for your customer are your best source of new negative keywords. Create shared negative keyword lists in Google Ads to apply the same exclusions across multiple campaigns — this prevents having to add the same terms repeatedly. The relationship between negative keywords and seed keywords is inverse: seed keywords define what you want to capture, negative keywords define what you want to exclude.

SOURCES

Google Ads Help — About Negative Keywords

Semrush — Negative Keywords: A Comprehensive Guide

Last updated: June 9, 2026

Related Terms

Seed Keyword

A broad, short keyword (typically 1–2 words) that serves as the starting point for a keyword research process, from which you expand into a comprehensive list of related keywords and phrases.

Keyword Intent

The underlying goal or purpose a user has when typing a search query — categorized as informational, navigational, commercial, or transactional — used to match content format to what searchers actually want.

Search Volume

The average number of times a keyword is searched per month in a given location, used to estimate the traffic potential of ranking for that term.

Put it into practice

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