Keyword Research with Google Keyword Planner: The Complete Guide for 2026

Effective keyword research is the cornerstone of every successful Google Ads campaign. Without the right search terms, you reach people at the wrong moments, pay for irrelevant clicks, and miss opportunities your competitors are happy to capture. Google Keyword Planner is the most widely used and most accessible starting point for this research, but getting the most out of the tool requires more than simply entering a query and downloading the first suggestions. In this guide, you will learn how to use Google Keyword Planner strategically, which pitfalls to avoid, how to choose the right match types, and how AI automation takes you from a one-off keyword export to a continuously learning keyword strategy.

What Is Google Keyword Planner and What Is It Used For?

Google Keyword Planner is a free tool within Google Ads that lets you look up search volume, competition level, and indicative bid prices (CPC) for search terms. You can use it to generate new keyword ideas based on a URL, a product, or a theme, and you can analyse existing keyword lists. The tool is primarily built for advertisers planning campaigns, but it is also useful for SEO orientation.

In practice, Google Keyword Planner serves three main purposes:

• Search volume research: finding out how many people search for a term each month, and whether that volume fluctuates seasonally.
• Keyword idea generation: discovering related search terms your audience uses that you may not yet have in your campaigns.
• Budget planning: estimating how much a campaign will cost based on expected CPC and desired volume.

One pitfall many advertisers overlook: Google Keyword Planner shows volume figures in broad ranges (e.g. "1,000 to 10,000 searches per month") unless you have an active, running Google Ads campaign. Once a campaign is live, you receive more accurate data. This makes the tool even more valuable as part of an active Google Ads strategy.

How Google Keyword Planner Works, Step by Step

To use Google Keyword Planner effectively, you follow a structured process. The key steps are:

1. Open Keyword Planner via Google Ads: go to your Google Ads account, click "Tools and settings", and choose "Keyword Planner" under the "Planning" menu.
2. Choose your starting point: you can start with one or more search terms, or with a URL from your own website or a competitor. The URL option is particularly useful for quickly generating a broad keyword set that aligns with your landing page content.
3. Apply filters: set the right language, country or region, and choose a relevant time period. For seasonal products, check the trend graph.
4. Analyse the results: pay attention to search volume, competition level (low, medium, high), and the indicative bid range. High competition means many advertisers are bidding on that term, which pushes up the CPC.
5. Select and group keywords: add relevant search terms to your plan and group them logically by theme for your ad groups.
6. Export or add directly: you can export keywords to a spreadsheet or add them directly to an existing or new campaign.

For a webshop like ToetsJeKennis.nl, which offers online exams and courses, you would start with core terms such as "online exam practice" or "certification online", and through URL analysis also discover long-tail variants such as "theory exam free practice" or "EHBO certificate online". These long-tail keywords typically have a lower CPC and a higher purchase intent, making them especially valuable for an e-commerce environment with an AOV of €50.

Understanding Match Types: Exact, Phrase, and Broad Match

Average CPC per Match Type in Google Ads (2026)

Indicative benchmarks for advertisers

Exact match

1.8€

Phrase match

1.4€

Broad match (unguided)

0.9€

Broad match + Smart Bidding

1.1€

One of the most underestimated aspects of keyword research is choosing the right match type. Google Keyword Planner shows search volume for keywords, but within your campaign you decide which match type to use. Each match type has different characteristics and suits different objectives:

In 2026, broad match performs considerably better than in earlier years, but only in combination with Smart Bidding and properly configured conversion tracking. Without that combination, broad match quickly leads to wasted budget. Phrase match is the safest starting point for most advertisers: it offers a good balance between reach and relevance.

Negative Keywords: The Overlooked Side of Keyword Research

Keyword research is not only about which search terms you want to target. Equally important is deciding which search queries you absolutely do not want to trigger. Negative keywords prevent your advertising budget from leaking towards irrelevant searches.

Consider Clima-Active.nl, an installer of air conditioning and heat pumps that works with quote requests. Their campaigns target people actively looking for installation. Without negative keywords, their ads would also appear for queries such as "fix air conditioning yourself", "second-hand heat pump" or "how to clean an air conditioner". These visitors are unlikely to request a quote. By adding these terms as negative keywords, the budget stays focused on genuine purchase intent.

A solid negative keyword list should include at minimum:

• Informational queries without purchase intent (e.g. "how does a heat pump work")
• DIY-related terms (e.g. "install yourself", "manual", "tutorial")
• Second-hand or free variants (e.g. "free", "used", "second-hand")
• Competitor names where you have no competitive advantage
• Terms from other industries that overlap (e.g. "car air conditioning" for a residential installer)

How AdBrains AI Automates and Strengthens Keyword Research

Manual Keyword Research vs. AdBrains AI

What does each approach deliver?

Manual

• One-time keyword export from Planner
• Subjective selection based on gut feeling
• Negative keywords discovered after weeks
• No automatic match type optimisation
• Monthly review, if time allows
• Growing search terms are missed

AdBrains AIAI advantage

• Daily automated search term mining
• Data-driven selection based on CPA and ROAS
• Negative keywords added same day
• Automatic match type recommendations
• Continuous 24/7 monitoring
• Keyword Incubator detects new opportunities

Google Keyword Planner is an excellent starting point, but it is by nature a snapshot in time. You do your research, export a list, go live with keywords, and that is it. The reality of a Google Ads campaign is far more dynamic: search queries change, new trends emerge, and the actual search terms on which your ads appear regularly differ from the keywords you have set. This is precisely where AdBrains AI makes the difference.

AdBrains has developed its own AI system that treats keyword research not as a one-off task but as a continuous, automated process. The most important components involved are the following.

The automated search term mining analyses every day all the search terms that have generated clicks and conversions. New opportunities are automatically detected, while irrelevant terms are added as negative keywords the same day. This structurally prevents budget waste, not just after a monthly manual review.

The Keyword Incubator is a system in which new keywords are first safely tested in a separate incubator campaign. Only once a keyword has built up sufficient conversion data and demonstrates a positive CPA or ROAS is it promoted to the production campaign. This eliminates the risk of manually adding unproven keywords to high-budget campaigns.

The multi-agent verification system ensures that every optimisation decision, including adding or excluding keywords, is checked by four independent AI agents before the change is executed. This prevents costly mistakes that occur regularly with manual management, such as accidentally excluding a converting search term.

Thanks to automatic tCPA/tROAS optimisation, bidding strategies per campaign are adjusted daily based on current conversion data and the client's margin targets. For a client like HACCP-cursus.com, a rise in search volume around food industry periods automatically leads to adjusted bidding, without any manual intervention from an account manager.

Finally, auto campaign expansion detects growing search terms not yet included in the campaign structure and automatically expands campaigns and ad groups. This way, a client like LeroyBrouwer.nl always benefits from emerging search terms in its market, even if those terms were never found during the initial keyword research.

The Keyword Incubator in Action

Keyword Incubator: From Search Term to Production

Flow rate per phase (% of identified search terms)

100% Identified search terms

All candidates from Planner and search term mining

68% Admitted to Incubator

Relevance and volume threshold met

41% Sufficient conversion data

Minimum statistically reliable data reached

28% Promoted to production

Positive CPA or ROAS achieved in test phase

28% of identified search terms reach production

The Keyword Incubator is one of the most distinctive features of the AdBrains AI platform. Rather than pushing every discovered keyword straight into a live campaign and hoping for the best, the Incubator creates a controlled test environment. New keywords identified through Keyword Planner data or daily search term mining enter the Incubator first. During this phase, the AI monitors performance closely: impressions, clicks, Quality Score signals, and most importantly, conversion outcomes.

If a keyword accumulates sufficient statistical confidence and shows a CPA or ROAS that meets the client's targets, it graduates to the production campaign automatically. If it underperforms or attracts irrelevant traffic, it is either paused or transformed into a negative keyword before it causes meaningful budget loss. This discipline, applying the rigour of a scientific test-and-learn cycle to every keyword decision, is what sets AI-driven keyword management apart from traditional approaches.

Keyword Research for E-Commerce vs. Lead Generation

The strategy behind keyword research differs substantially depending on whether you manage an e-commerce shop or a lead generation campaign. Both use Google Keyword Planner, but the criteria for selecting keywords are different.

In e-commerce, such as ToetsJeKennis.nl or E-4motion.com, the focus is on transactional search intent. Keywords containing purchase words such as "buy", "order", "cheap", "deal" or specific product names typically perform best. ROAS is the leading KPI, and keywords are evaluated based on their contribution to revenue, not just click volume.

In lead generation, such as Clima-Active.nl (quote requests for air conditioning and heat pump installation), the emphasis is more on commercial intent and orientation. Keywords like "air conditioning quote", "heat pump installation cost" or "air conditioner installer [city]" work well. Cost per lead is the primary KPI. Location-specific search terms are especially valuable here.

A practical rule of thumb for initial keyword selection from Google Keyword Planner:

• E-commerce: prioritise keywords with high purchase intent and an acceptable CPC, even if volume is lower.
• Lead gen: prioritise keywords that combine orientating-to-transactional intent, with attention to geographic specificity.
• Both: always start with exact match and phrase match for proven search terms; use broad match only once Smart Bidding and conversion tracking are properly configured.
• Both: set up negative keywords before your campaign goes live, not after the first budget has been wasted.

Frequently Asked Questions About Keyword Research with Google Keyword Planner

Is Google Keyword Planner free to use?

Yes, Google Keyword Planner is freely available to anyone with a Google Ads account. You do not need an active campaign or budget to use it. However, without an active campaign, the tool displays volume figures in broad ranges rather than exact monthly numbers. With an active campaign, even with a small budget, you receive more accurate data. It therefore pays to use the tool from within an active Google Ads account.

How do I choose the right keywords for my campaign?

The right keywords combine three elements: relevance to your product or service, sufficient search volume to generate clicks, and an acceptable CPC within your budget. Start with the core phrases that best describe your offering, use Google Keyword Planner to discover related variants, and filter for purchase intent. Then use match types to control your reach. For e-commerce, begin with transactional keywords; for lead generation, focus on terms that attract buyers who are actively comparing options.

What is the difference between search volume and competition level in Keyword Planner?

Search volume indicates how many people search for a particular term each month. Competition level (low, medium, or high) indicates how many advertisers are bidding on that keyword in Google Ads. High search volume combined with high competition means a higher CPC and more competition for top positions. Low search volume with low competition can be a hidden opportunity, especially if the intent is strongly transactional. The ideal keywords combine a healthy volume with an affordable competition level for your budget.

How does AdBrains help with keyword research and management?

AdBrains automates keyword research and management through multiple AI modules. The automated search term mining analyses daily which search terms are generating clicks and conversions, and automatically adds irrelevant terms as negative keywords. The Keyword Incubator safely tests new keywords in a separate test campaign before promotion to production. The multi-agent verification system checks every decision before execution. Together, these systems ensure that the keyword strategy is continuously improved without manual intervention, and that every euro of budget is directed towards the most profitable search terms.

Why are long-tail keywords important for Google Ads?

Long-tail keywords are longer, more specific search queries with generally lower monthly volume but higher purchase intent. They matter because they face less competition, carry a lower CPC, and attract visitors who are already further along in their buying journey. For a webshop like E-4motion.com, "buy lightweight compact electric folding bike" is far more valuable than the broad term "electric bike", because the searcher knows exactly what they are looking for. Google Keyword Planner is particularly useful for systematically uncovering long-tail variants through its suggestion function and the related keywords in the results overview.