Online, visibility in search engines is often the difference between growth and standing still. If you want to be found by the right audience, there is no way around keyword research. It underpins both search engine optimisation (SEO) and paid search campaigns (SEA). In this guide I explain step by step what keyword research involves, why it matters so much and how to put it into practice.
What is keyword research?
Keyword research is about uncovering the search terms your audience uses: the words, questions and phrases people type into Google when they are looking for information, products or services. The aim is to understand the intent behind those searches and respond to it with relevant content or ads.
Why is keyword research important?
Good keyword research gives you insight into your customers. You discover which problems, questions or needs they have and the words they use to describe them. For SEO, this produces content that better matches what people are searching for. For SEA, it lets you tailor campaigns to purchase intent.
A concrete example: a company in the financial sector decided to target long-tail keywords that closely matched its services. As a result, a single blog post was attracting thousands of visitors a month within a few months. Success stories like this are not down to luck, but to systematic research and smart use of search intent.
Search intent: the key to success
Keyword research is not just about volume; above all, it is about intent. Broadly speaking, there are four types of search intent:
Informational searches
The user is looking for knowledge or an explanation, for example “how does keyword research work?”.
Commercial searches
The user is comparing products or services, such as “best SEO tools 2025”.
Transactional searches
The user wants to buy or request something straight away, for example “SEO agency Amsterdam”.
Navigational searches
The user is looking for a specific website or brand, such as “Zalm Partners SEO”.
By linking keywords to these intents, you get a better sense of which content or ad fits.
How do you find the right keywords?
The process often starts with brainstorming themes. Next, you look at competitors, use Google's suggestions, analyse forums and consult your Search Console data. Tools such as Ahrefs and SEMrush can take the research further with search volumes, trends and difficulty scores.
It is wise to cluster keywords by theme. That keeps things manageable and makes it easy to decide later which content to create.
Selecting and prioritising keywords
Not all keywords are equally valuable. You look at search volume, competition, relevance and search intent. Broad keywords tend to be competitive, while long-tail keywords bring more specific traffic that converts better.
It also helps to link keywords to the stages of the customer journey: orientation, comparison, purchase and retention. That way your content strategy covers the whole funnel.
Common keyword research mistakes
Many businesses make the same mistakes. A classic pitfall is focusing only on high-volume keywords. That looks attractive, but often leads to fierce competition and few conversions.
Another mistake is treating keyword research as a one-off exercise. Search behaviour changes constantly and competitors respond to it too, so repeating the research regularly is crucial.
Finally, businesses often forget to look at search intent. Optimising an article for a transactional term when the content is informational frustrates visitors and leads to poor rankings.
Integrating it into your content strategy
Keyword research should not be a stand-alone exercise but part of your overall marketing approach. Once you know what your audience is searching for, you can translate it into:
- Blog posts that answer questions in the orientation phase.
- Landing pages aimed at purchase intent.
- Social media content that ties in with trending search terms.
- SEA campaigns that target specific product combinations.
The result is a consistent approach that reaches your audience at every relevant moment.
Documentation and repetition
Thorough keyword research ends with clear documentation. Work with themes and clusters and repeat the process regularly, so you keep responding to trends, seasonal effects and changing behaviour.
Q&A: frequently asked questions about keyword research
How often should I do keyword research?
At least once a year, but preferably every six months. That way you keep up with trends and the competition.
Are long-tail keywords always better?
Not always, but often. They are more specific, match the searcher's intent more closely and therefore tend to deliver more conversions.
Can I get started without tools?
Yes. Google's suggestions, Search Console and Google Trends will take you a long way. Tools simply make the process faster and more complete.
What is the difference between keyword research for SEO and for SEA?
With SEO you focus on lasting visibility, whereas SEA is about fast, paid results. The basics are the same, but the application differs.
How do I know whether my keywords are working?
Measure in Google Analytics and Search Console. Look at clicks, impressions and conversions to see whether you have made the right choices.
