Keywords 101: What They Are and How to Use Them

Keywords are the words and phrases people type into search engines when they are looking for something. In marketing, they are the bridge between what your audience wants and what your content, ads, and pages offer. Get that bridge right and you attract the right people at the right moment. Get it wrong and you spend money talking to nobody in particular.

This is not a technical SEO article. It is a grounding exercise. Most marketers who struggle with keyword strategy are not missing a tool or a tactic. They are missing a clear mental model for what keywords actually represent and how they connect to commercial outcomes.

What Is a Keyword, Really?

A keyword is a signal. It tells you something about what a person is thinking, what problem they are trying to solve, and how far along they are in solving it. When someone types “running shoes” into Google, they are browsing. When they type “best cushioned running shoes for flat feet under £100”, they are close to buying. Same product category, completely different commercial moment.

Early in my agency career, I made the same mistake most performance marketers make. I chased volume. If a keyword had high search numbers, it felt important. If it had low numbers, it felt like a waste of time. It took a few years of managing significant ad budgets across multiple categories before I understood that volume is a measure of popularity, not profitability.

The more useful question is not “how many people search for this?” but “who is searching for this, and what are they ready to do?” A keyword with 200 monthly searches from people who are actively comparing suppliers can be worth more than a keyword with 20,000 searches from people who are vaguely curious.

This is part of a broader set of go-to-market principles worth getting right before you build out any content or paid search plan. The Go-To-Market and Growth Strategy hub covers the commercial thinking that should sit behind decisions like these, from audience definition through to channel mix and measurement.

The Three Types of Keyword Intent You Need to Understand

There are different ways to categorise keywords. Some people use informational, navigational, and transactional. Others use awareness, consideration, and conversion. The labels matter less than the underlying logic: different searches reflect different states of mind, and your content or ads need to meet people where they actually are.

Informational keywords are the questions people ask when they are trying to understand something. “What is content marketing?” or “how does programmatic advertising work?” are informational searches. The person is learning. They are not ready to buy. If you try to sell to them at this point, you will lose them. If you teach them something genuinely useful, you build credibility that compounds over time.

Consideration keywords sit in the middle. “Best email marketing platforms for small businesses” or “HubSpot vs Mailchimp” are consideration searches. The person knows what they need. They are comparing options. This is where a lot of brands are conspicuously absent, and where the real competitive battle is often won or lost before anyone clicks a buy button.

Transactional keywords signal purchase intent. “Buy CRM software”, “book a marketing consultant”, “get a quote for SEO services”. The person has made a decision in principle. They are looking for the right provider. This is where most performance budgets go, and for understandable reasons. But it is also the most competitive and expensive territory, because everyone else is bidding there too.

When I was running agency teams, we would sometimes inherit paid search accounts that were almost entirely bottom-funnel. Every keyword was a high-intent, high-cost transactional term. The cost per acquisition looked manageable on paper, but what the data never showed was how much of that conversion was happening anyway, driven by brand awareness or offline touchpoints that the search campaign was simply capturing at the last moment. Tools like Semrush can help you map keyword landscapes across intent types, but the strategic thinking about which intent levels to prioritise has to come from you, not the platform.

How Keyword Research Actually Works

Keyword research is the process of identifying which search terms are relevant to your business, understanding how competitive they are, and deciding which ones to pursue through content, SEO, or paid search. It sounds methodical, and the mechanics are fairly straightforward. The harder part is making good decisions about what the data means.

The starting point is always your customer, not a keyword tool. Before you open any platform, write down the problems your customers are trying to solve. Not the features of your product, and not the language your internal team uses to describe what you do. The language your customers use when they are searching for a solution to a problem they have, often before they know your product exists.

This is harder than it sounds. I have sat in more than a few briefing sessions where a client described their audience in terms of their own product categories rather than the audience’s actual needs. A software company selling project management tools might assume their customers are searching for “project management software”. Some are. But others are searching for “how to stop missing deadlines” or “why my team keeps dropping the ball on handovers”. Those informational searches represent the same audience, earlier in the process, before they have decided that software is even the answer.

Once you have a list of seed topics rooted in customer problems, you use keyword research tools to expand them. You look at search volume to understand scale. You look at keyword difficulty to understand how hard it will be to rank organically. You look at cost-per-click data if you are running paid search, because CPC is a useful proxy for commercial intent. High CPC terms tend to be high-intent terms, because advertisers are willing to pay more for clicks that convert.

Then you make choices. You cannot pursue everything. A focused list of 20 to 30 keywords that are genuinely relevant, commercially meaningful, and achievable given your domain authority or budget will outperform a sprawling list of 500 terms that nobody has the bandwidth to actually create content for.

Long-Tail Keywords and Why They Matter More Than Most Brands Admit

Long-tail keywords are longer, more specific search phrases. They typically have lower search volumes than broad head terms, but they also tend to have higher conversion rates and lower competition. “Marketing agency” is a head term. “B2B marketing agency for SaaS companies in the UK” is a long-tail keyword.

The logic is simple. The more specific a search query is, the more clearly it signals what the person wants. And the more clearly you can match your content or offer to that specific need, the more likely they are to engage, convert, or take the next step.

There is a parallel here that I have used when explaining this to clients. Think about someone who walks into a clothes shop and tries something on. They are not just browsing anymore. They have self-selected. They have found something that interested them enough to engage with it physically. The probability they will buy is dramatically higher than someone who walked past the window. Long-tail searchers are the people who tried something on. They have already done most of the qualifying work themselves.

The brands that dismiss long-tail keywords because of low volume are making a volume-first error. They are optimising for the metric that is easiest to see, not the metric that matters most. Go-to-market execution feels harder now partly because the easy wins, the high-volume generic terms, are more contested and more expensive than they have ever been. Long-tail strategy is one of the more defensible routes through that environment.

The Relationship Between Keywords and Content

Keywords without content are just a list. Content without keywords is just writing. The connection between the two is where the commercial value lives.

When you identify a keyword that represents a real customer problem, the right response is to create content that genuinely addresses that problem. Not content that mentions the keyword several times in the hope that Google notices. Not content that buries the answer under three paragraphs of preamble. Content that earns the click by delivering something useful, clear, and specific.

This is where a lot of content marketing programmes go wrong. The keyword research happens, the content brief gets written, and then the actual article gets produced by someone who treats the keyword as a box to tick rather than a signal to respond to. The result is content that ranks for nothing, helps nobody, and gradually clutters up a domain with pages that dilute rather than build authority.

The better approach is to treat each keyword as a question that deserves a real answer. What does someone searching for this term actually need to know? What would genuinely help them? What would make them feel that clicking on your result was worth their time? If you can answer those questions honestly, you have the brief for a piece of content that has a chance of performing.

I spent time judging the Effie Awards, which evaluate marketing effectiveness rather than creative execution. The work that consistently performed well shared a common trait: it was built around a real human insight, not a product claim. The same principle applies to keyword-driven content. Start with the person and the problem. The keyword is just the language they happen to use to describe it.

Keywords in Paid Search: What the Data Does and Does Not Tell You

Paid search is where keyword strategy becomes immediately measurable and immediately expensive if you get it wrong. You bid on keywords, your ads appear when someone searches for those terms, and you pay when someone clicks. The appeal is obvious: you can see exactly which keywords are driving clicks, conversions, and revenue.

The risk is that the data creates a false sense of precision. You can see that keyword A drove 12 conversions last month and keyword B drove 3. That looks like a clear signal to invest more in keyword A and cut keyword B. But what the data does not show you is what happened before the search. Did those 12 people convert because of the keyword, or because they had already seen your brand somewhere else and the search was just the final step? How much of that conversion would have happened anyway through direct traffic or a branded search if you had not been bidding on that term?

I spent years managing large paid search budgets and watching clients make decisions based on last-click attribution that systematically overstated the contribution of bottom-funnel keywords. The performance looked strong. The ROAS looked healthy. But when we dug into incrementality, the picture was more complicated. A lot of what performance was being credited for was demand that already existed, not demand that the campaigns had created.

This does not mean paid search on transactional keywords is wrong. It means you need to be honest about what it is doing. It is capturing intent that exists. To create new intent, to reach people before they search, you need a broader strategy that includes brand, content, and channels that operate higher up the funnel. BCG’s commercial transformation research points to the same tension: growth-oriented organisations balance demand capture with demand creation, rather than optimising entirely for the former.

Keyword Mapping: Connecting Terms to Pages and Stages

Keyword mapping is the process of assigning specific keywords to specific pages on your website, or to specific pieces of content in your editorial plan. It sounds like an administrative task. In practice, it is one of the more important strategic decisions in organic search.

Without keyword mapping, you end up with multiple pages competing for the same term, which confuses search engines and dilutes your authority. You also end up with gaps, important search terms that nobody on your site is addressing. Mapping forces you to be deliberate about which page owns which keyword and what role each piece of content plays in the overall structure.

The practical approach is to start with your most important commercial keywords and work outward. Your core service or product pages should own your highest-intent transactional terms. Your blog or resource section should own informational and consideration terms. Supporting content should link back to core pages to consolidate authority.

This is also where the funnel logic matters. If you map your keywords to the stages of your customer’s decision process, you start to see the gaps clearly. Most brands have reasonable coverage at the bottom of the funnel and almost nothing in the middle. They are visible when someone is ready to buy and invisible during the weeks or months when that person was forming their opinion about which type of solution they wanted. Fixing that gap is often where the biggest organic growth opportunities sit.

How to Prioritise Keywords When You Cannot Do Everything

Every keyword list is longer than your bandwidth to act on it. Prioritisation is not optional. The question is what criteria you use.

Volume and difficulty are the obvious starting points, but they are not the whole picture. A keyword with moderate volume, low competition, and high commercial intent will often deliver better results than a high-volume keyword in a competitive space where you have no realistic chance of ranking in the near term.

Relevance is non-negotiable. A keyword that drives traffic from people who will never buy from you is a vanity metric. It inflates your session numbers and tells you nothing useful. I have seen agencies (and run one, for a period, that I was brought in to turn around) where content was being produced for keywords that were technically in the right category but were attracting entirely the wrong audience. The traffic looked impressive. The commercial return was negligible.

A useful prioritisation framework considers four things: search volume, keyword difficulty, commercial relevance, and your current authority in that topic area. Keywords where you score well on all four are your immediate priorities. Keywords where you score well on relevance and commercial intent but face high difficulty are your medium-term investments, where you build authority through supporting content before competing for the main term. Keywords that score high on volume but low on relevance are candidates for the bin, regardless of how appealing the traffic numbers look.

There is more on the strategic thinking behind decisions like this in the Go-To-Market and Growth Strategy hub, which covers how channel, content, and audience decisions connect to commercial outcomes. Keyword strategy does not exist in isolation. It sits inside a broader set of choices about where to compete and how.

Keyword Strategy Is Not a One-Time Exercise

Markets change. Language evolves. New competitors appear. Products get discontinued. Customer problems shift. A keyword strategy that was right eighteen months ago may be pointing you in the wrong direction today.

This is not an argument for constant reinvention. It is an argument for regular review. Quarterly is a reasonable cadence for most businesses. You are looking for terms that have grown in volume, terms that have declined, new competitor content that is outranking you on keywords you care about, and emerging search patterns that reflect changes in your market.

The brands that treat keyword research as a one-time setup task tend to find themselves gradually losing ground without understanding why. The brands that build it into a regular rhythm stay closer to what their audience is actually thinking and searching for, which is the whole point.

Forrester’s intelligent growth model emphasises the importance of staying close to customer signals rather than relying on static assumptions. Keyword data is one of the more direct customer signals available to marketers. People tell you what they are thinking every time they type something into a search bar. The question is whether you are paying attention.

I have been in the room when agencies presented keyword strategies that were built on data that was eighteen months out of date. The client had launched a new product line, the market had shifted, and a competitor had moved aggressively into a space that had been wide open. The strategy looked thorough. It was just answering the wrong question.

The Mistake Most Marketers Make With Keywords

The most common mistake is treating keywords as the goal rather than the means. You are not trying to rank for keywords. You are trying to reach people who have a problem you can solve, at a moment when they are receptive to hearing about it. Keywords are the mechanism. The goal is the commercial outcome.

This sounds obvious. In practice, it gets lost constantly. Teams optimise for rankings. They celebrate traffic. They report on impressions and click-through rates. None of those metrics are wrong, but they are intermediate measures, not outcomes. The outcome is a customer who found you, trusted you, and bought from you. Everything else is a step on the way there.

When I was at Cybercom early in my career, a founder handed me a whiteboard pen mid-brainstorm and walked out to a client meeting. The brief was for Guinness. I remember thinking, very clearly, that this was going to be difficult. But the thing that got me through it was not a process or a framework. It was starting with the person drinking the pint rather than the product in the glass. The same instinct applies to keyword strategy. Start with the person. Start with their problem. Work backward to the language they use. Then build from there.

Keywords done well are a form of listening at scale. They tell you what your market is thinking, what problems are growing, what language is resonating, and where the gaps are between what people need and what your competitors are offering. That is genuinely valuable intelligence. But only if you treat it as a window into your audience rather than a list of boxes to tick.

About the Author

Keith Lacy is a marketing strategist and former agency CEO with 20+ years of experience across agency leadership, performance marketing, and commercial strategy. He writes The Marketing Juice to cut through the noise and share what works.

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