Negative Keywords in Google Ads: How to Reduce Irrelevant Clicks
In Google Ads, not every search containing a target keyword is relevant to the products or services a business offers. Someone searching for “free website design course” may not be a potential customer for a paid course. Someone searching for “air conditioner repair at home” has a completely different need from someone who only wants to view a do-it-yourself guide. If a campaign cannot distinguish between these cases, its budget may be consumed by clicks that are unlikely to generate inquiries, orders, or registrations.
Negative keywords are one of the important tools for addressing this issue. When built correctly, this list helps prevent ads from appearing for irrelevant queries while clarifying the reach of each ad group. However, negative keywords should not be added hastily. A keyword that seems irrelevant in one context may be valuable in another. Therefore, management should be based on search data, business objectives, and the company’s actual ability to serve customers.
How Do Negative Keywords Work?
Negative keywords are words or phrases added to a campaign or ad group to limit ads from appearing when a user’s query contains an unwanted signal. For example, a business that only sells accounting software might consider terms such as “free,” “crack,” or “trial download” if these queries do not fit its business model. A center that only provides in-person training in Ho Chi Minh City may need to consider queries related to online learning, but only after clearly determining whether it truly does not serve that customer segment.
The important point is that negative keywords are not simply a list of “bad” words. The value of a phrase depends on the campaign objective and the specific product. The term “cheap” may be an unsuitable signal for a premium brand, but it may be very important to a store positioned around competitive pricing. Similarly, the term “comparison” may attract users who are still in the research stage, while a campaign optimized solely for direct calls may not want to pay for visits from people who are not yet ready to make contact.
Start with the Search Terms Report
The most practical source of data for building negative keywords is the search terms report in the advertising account. This report shows which queries have led to impressions or clicks, depending on the scope of data provided by the system. When reviewing the report, do not look only at a few high-cost queries. Consider the query content, landing page, device, time, location, and the user’s actions after visiting.
A query with many clicks but no conversions yet does not necessarily need to be removed immediately. The user may be in the research stage, have a long decision-making process, or need consultation before purchasing. Conversely, a low-cost query that clearly indicates an unsuitable intent can still reduce traffic quality. For example, if a business only provides implementation services for corporate customers, queries seeking self-study materials, free templates, or step-by-step guides may need to be evaluated separately.
During analysis, group queries by the reason they are unsuitable rather than adding each phrase individually. One group may relate to free offerings, another to recruitment, another to jobs, another to used products, or another to demand in areas the business does not serve. This grouping makes the list easier to control and reduces the risk of overlooking similar variations.
Common Groups of Negative Keywords to Consider
The first group consists of queries that do not fit the business model. A business selling new products may not want to appear to people searching for used goods, clearance items, or rentals. A professional services provider may not serve people seeking free consultations or sample materials. However, this is only an initial direction for review. The final decision must still be based on sales policies and actual contact data.
The second group consists of queries related to recruitment, salaries, job descriptions, or vocational training. These terms often appear when a brand publishes hiring content, but they do not reflect demand for a product. If a campaign targets customers, separating or excluding recruitment-related queries can help reduce irrelevant traffic.
The third group consists of needs related to technical support or free materials. For some businesses, people looking for usage instructions may still be existing customers who should remain in a retention campaign. For a campaign focused on acquiring new customers, however, these queries may not be a priority. Therefore, do not assume that every phrase containing “guide,” “how to,” or “materials” should be excluded.
The fourth group consists of queries from the wrong location or outside the service area. A provider operating in only certain provinces or cities may receive many searches from places where it cannot deliver products or implement services. In this case, geographic filters, location settings, and negative keywords should be considered together. Negative keywords cannot completely replace proper location-targeting configuration.
Distinguishing Campaign-Level and Ad Group-Level Application
Negative keyword lists can be applied broadly or narrowly. Campaign-level negative keywords are suitable for cases that have no value across the entire campaign. For example, a business that does not provide free services for any product group can manage this type of term at the campaign level to avoid repetition.
In contrast, ad group-level negative keywords are suitable when traffic needs to be directed between different products, services, or messages. A campaign may promote both website design services and website maintenance services. When users search for maintenance services, the business may want the appropriate maintenance ad to appear instead of allowing the design group to compete for the same query. Cross-negative keywords between groups help clarify the account structure and direct users to the appropriate landing page.
Be careful when adding a keyword to a shared negative list used across multiple campaigns. A phrase that is unsuitable for a new-customer acquisition campaign may be useful in a remarketing campaign or a campaign for existing customers. Before applying a shared list, check the objective, product, location, and funnel stage of each campaign.
Do Not Overuse Negative Keywords
The greatest risk in managing negative keywords is reacting too quickly to a few clicks that have not produced results. If many phrases are excluded at once, a business may reduce its ability to reach genuinely suitable users who express their needs differently from initial expectations. This is particularly important for products with long purchasing cycles, less common needs, or multiple names used in practice.
Rather than excluding an entire broad term, consider the complete phrase and its surrounding context. For example, if “jobs” is an unsuitable signal, check whether commercial queries containing this term exist before applying the exclusion broadly. If a business offers both free products and paid packages, removing the term “free” at the campaign-wide level could unintentionally block part of its messaging.
After adding negative keywords, monitor the search terms report, costs, conversions, and contact quality again over a period appropriate to the campaign’s traffic volume. Not every change produces an obvious result immediately. The important thing is to record when the change was made, why it was made, and its scope so that its impact can be evaluated more accurately.
Build a Sustainable Management Process
Businesses should establish a regular process instead of checking only when spending becomes unusually high. The review frequency depends on the account size and search volume, but each review should focus on new queries, groups with rising costs, clicks that do not lead to action, and contacts judged to be unsuitable.
A simple tracking sheet may include the search term, the reason it should be excluded, the scope of application, the date it was added, and the approver. This record helps prevent situations in which one team member removes a keyword without others knowing why, or a keyword is repeatedly added and removed. For accounts with multiple products, establishing naming conventions for negative keyword lists also makes reviews and handovers more convenient.
In addition to data in Google Ads, the marketing team should communicate with sales and customer service teams. Consultants often recognize types of needs that cannot be converted, product descriptions that are easily misunderstood, or areas the business does not yet serve. This information should be compared with advertising data before being turned into a negative-keyword rule, but it provides a perspective that click reports cannot fully show.
Conclusion
Negative keywords are not a tool for narrowing traffic at all costs. Their purpose is to help focus the budget on queries that are more likely to match the product, service, and business objective. To achieve this, businesses need to start with the search terms report, classify the reasons for irrelevance, choose the correct scope of application, and monitor the impact after making changes.
A good list is not the longest list but one with clear reasons, controlled updates, and no unnecessary blockage of worthwhile opportunities. By combining advertising data with insights from the sales team, businesses can reduce off-target clicks, improve traffic quality, and create a stronger foundation for optimizing Google Ads based on actual results.
