How to use negative keywords to reduce wasted ad spend

Paid search can generate valuable enquiries, but irrelevant clicks quickly consume a small business’s budget. A person searching for free software, a job, a course or a second-hand product may have no intention of buying your service, even when their wording resembles a profitable keyword.

Negative keywords help Google Ads filter out these low-value searches before they trigger an impression or click. Used carefully, they improve traffic quality, increase budget efficiency and give your campaigns a clearer connection to qualified leads.

For Australian businesses, this process should reflect local language, locations and buying habits. Search behaviour in Sydney may differ from regional Queensland, while terms such as “ tradie”, “hire”, “quote” and “near me” can carry different commercial meanings depending on the industry.

Why wasted clicks happen

A campaign can attract irrelevant traffic when keywords are broad, closely related to other industries or interpreted differently from the advertiser’s intention. A company selling premium office furniture, for example, could receive searches for “free office furniture”, “office furniture jobs” or “DIY desk plans”.

Location can create another source of waste. A Melbourne business may receive clicks from Perth or Auckland if its geographic settings are too broad. Some searches include suburbs, while others rely on “near me” location signals from mobile devices used on trains, in shopping centres or during a commute.

Negative keywords exclude unwanted themes from your targeting. They do not replace relevant ad copy, landing page improvements or geographic settings, but they make each remaining click more likely to come from someone with a genuine commercial need.

Build a useful negative keyword list

Start with the Google Ads search terms report. Review the actual queries that generated impressions and clicks, then group irrelevant phrases by intent. Common categories include employment, education, free resources, repairs, manuals, reviews, wholesale products and competitors that your business does not serve.

Create a shared negative keyword list for exclusions that apply across several campaigns, such as “free”, “jobs” or “course”. Keep campaign-specific terms separate when a word is useful in one area but harmful in another. For help connecting keyword research with broader channel planning, this guide on content and paid ads provides useful context.

Check every proposed exclusion before applying it. If an Australian electrician adds “solar” as a negative, the campaign could lose valuable searches for solar installation. A better exclusion might be “solar jobs” or “solar DIY”, depending on the service offered.

Choose match types carefully

Google Ads supports negative broad, negative phrase and negative exact match types. Negative broad can block a search when all the negative terms appear, even if their order changes. Negative phrase blocks searches containing the words in the same sequence, while negative exact applies to a precise query.

Use broad exclusions for clearly irrelevant concepts and phrase or exact exclusions when a term has mixed intent. A business selling “apple storage boxes” should avoid adding “apple” as a broad negative, because that could remove searches for a legitimate product category.

Negative keywords also require maintenance because spelling variations, singular and plural forms, and different wording may need separate exclusions. Review search terms regularly rather than assuming one addition will solve every variation.

Adapt exclusions to Australian search behaviour

Australian advertisers should account for local vocabulary and geographic intent. “Tradie”, “ ute”, “mum”, “uni” and “op shop” may appear in searches that differ from American keyword datasets. A Brisbane pest control company might want to exclude “DIY”, while still targeting “emergency pest control Brisbane” and nearby suburbs.

Seasonality matters as well. Searches can shift during school holidays, the Boxing Day sales period and major sporting events. A retailer may see more bargain-focused traffic around end-of-financial-year promotions, while professional services may receive fewer enquiries when decision-makers are away.

Review location reports by city, suburb and state. If a Sydney campaign serves all of New South Wales, searches from Newcastle or regional areas may be valuable, irrelevant or outside the service radius. Negative location targeting and campaign structure should reflect delivery capacity rather than assumptions.

Measure savings without harming leads

Track more than the number of blocked clicks. Compare cost per qualified lead, conversion rate, impression share and search term quality before and after adding exclusions. A lower click volume is useful only when it preserves or improves meaningful enquiries.

Allow enough data to identify patterns, especially when conversion cycles are long. For a commercial builder or financial adviser, a click may take weeks to become a sale. Australian Privacy Act obligations and platform privacy thresholds can also limit the detail available in reporting, so combine account data with CRM outcomes where possible.

Keep a change log showing the negative keyword, match type, date and reason for adding it. If leads decline, the record makes it easier to identify an overbroad exclusion and restore the affected traffic promptly.

Maintain a disciplined optimisation routine

Negative keyword management works best as a recurring part of paid search administration rather than a one-off clean-up. A monthly review may suit a low-volume B2B account, while ecommerce campaigns or competitive markets may need weekly checks.

Use these recommendations to keep exclusions precise:

Businesses that want a structured review of targeting, tracking and budget allocation can contact Mitora’s team for a tailored approach. Clear reporting and regular refinement help turn negative keywords into a practical way to protect ad spend while keeping high-intent Australian searches in reach.