SEM keyword research helps advertisers find searches related to their products, services, and business goals. The aim isn’t to build the biggest keyword list, but to choose search terms that suit your offer, show user intent, and can be measured by real results.
Good research uses customer language, keyword tools, search-term data, competitor research, and an understanding of the sales process. It should also identify irrelevant searches to cut wasted ad spend. From there, the next step is to turn that research into a clear process.
A typical SEM keyword research process includes these main steps:
- Define your products, services, and customer needs
- Classify search intent for your target audience
- Use keyword tools and real search data
- Group related keywords into focused campaigns
- Build a negative keyword list
- Match keywords to ads and landing pages
- Measure keyword quality and refine your targets
By adhering to these steps, you can keep your keyword research organised, practical, and focused on your business goals.
What Is SEM Keyword Research?
SEM keyword research means finding and evaluating the search terms potential customers use on search engines. These keywords help advertisers decide:
- Which searches to target
- How to structure campaigns and ad groups
- What ad copy to write
- Which landing pages to use
- Which negative keywords to add
- How to measure campaign performance
The best keywords aren’t always the ones with the most searches. Sometimes, a keyword with fewer searches is more valuable if it shows strong buying intent and brings in good leads at a reasonable cost. That’s why intent matters as much as volume when you compare search terms.
- Start With Products, Services, and Customer Needs
Commence by listing the products and services you want to promote. Then figure out:
- Locations you serve
- Problems your business solves
- Customer types you want to reach
- Questions prospects ask before contacting you.
- Common industry terms
- Language used in sales calls and enquiry forms
- Services or audiences you do not want to target
For an SEM agency, relevant keyword categories might include:
- Search engine marketing services
- Paid search management
- Google Ads management
- PPC campaign management
- SEM agency services
- Location-specific SEM terms
The keyword list should reflect your actual services, target locations, available budget, and ideal customers. Avoid targeting terms for services you don't offer just because they have high search volume. Once you know what to target, you can match those terms to the right intent.
- Classify Search Intent
Search intent is about what someone wants to do when they search. Knowing this helps you choose the right keywords, ads, landing pages, and calls to action.
Informational Intent
The user desires to learn or understand a topic.
Example: “ What is search engine marketing ?”
A detailed guide or educational article is often the best landing page.
Commercial Investigation Intent
The user is comparing providers, services, or solutions.
Example: “Best SEM agency for small business”
A service page, comparison page, case study, or consultation page may be appropriate.
Service-Focused Intent
The user is looking for a specific service, often in a particular location.
Example: “SEM services in Bangalore”
A relevant SEM services page with clear service details and an enquiry option may be suitable.
Transactional Intent
The user is ready to take action.
Example: “Hire Google Ads consultant”
A conversion-focused service or contact page may be the best destination.
These categories can overlap. Check the search wording and real search results before deciding on intent. Make sure your landing page matches what visitors expect. Once you define intent, you can use tools and real figures to refine your keyword list.
- Use Keyword Tools and Real Search Data
Keyword research tools can help estimate:
- Search demand
- Competition
- Cost-per-click ranges
- Keyword variations
- Related searches
- Seasonal changes
Google Keyword Planner and similar tools give helpful estimates, but these numbers aren’t promises of traffic, clicks, leads, or sales. For greater insights, experienced marketers often use paid tools like SEMrush, Ahrefs, and SpyFu to compare keyword data, see competitor activity, and grow their keyword lists. Sources of information include: After gathering these inputs, compare them with real search behaviour before you choose keywords.
- Keyword Planner
- Search Console queries
- Paid campaign search-term reports
- Website analytics
- Customer enquiry forms
- Sales calls
- CRM records
- Competitor advertisements
- Internal search data
- Customer service questions
Search Console can show queries that already bring organic visitors to your website. Paid search-term reports show the actual searches that triggered your advertisements.
Validate every keyword against:
- Relevance to the service
- Search intent
- Target location
- Competition
- Conversion value
- Expected lead quality
- Available landing-page content
Don’t pick keywords just because they have a lot of searches. After validating the data, the next step is to organise related terms into focused campaigns.
- Group Related Keywords Into Focused Campaigns
Organise keywords around distinct:
- Services
- Products
- Offers
- Locations
- Customer needs
- Stages of the buying journey
Each ad group should be focused enough so that both the ad and landing page speak directly to the searches in that group. Don’t put all your keywords into one ad group if they cover different services or intents. For example, SEM agency services and Google Ads account management need different messages.
Campaign Example: After restructuring their ad groups, one company shifted from a single large ad group with mixed keywords such as "SEM agency," "PPC management," and "Google Ads consulting" to separate, focused ad groups for each service. As a result, each ad group had tailored ads and more relevant landing pages. Over the next month, their click-through rate improved by 22 per cent and their cost per qualified lead dropped by 15 per cent, thanks to more relevant messaging and better coordination with each search intent.
If your offers, customer needs, or landing pages differ, review them and define your campaign structure so you can manage and measure each one separately. With that framework in place, you can build a negative keyword list to filter irrelevant traffic.
- Build a Negative Keyword List
Negative keywords help prevent ads from appearing for searches that are irrelevant to your campaign. They can help reduce wasted spend caused by:
- Unrelated meanings
- Job searches
- Free-resource searches
- Educational searches that do not match your goal
- Services you do not provide
- Locations you do not serve
- Product categories you do not sell
Check your search-term reports often to spot mismatches. Add exclusions carefully, since keyword matching and close variants can change which searches get filtered.
Don’t exclude a keyword just on a hunch. First, see if the search could be a real customer need. Then check the platform’s matching rules before making broad exclusions. Then keep refining your negative keyword list as reports reveal new mismatches.
For best results, build and update your negative keyword list regularly. Review search-term reports frequently to catch irrelevant matches or new search terms you should exclude. Consider shared negative keyword lists across multiple campaigns to filter unwanted traffic consistently. Schedule negative-keyword audits to remove terms that may block valuable searches as your campaign or offerings evolve.
- Match Keywords to Ads and Landing Pages
Your ad must match what the user searched for and the service you offer. The landing page should retain the same message and show the next step clearly.
A relevant landing page should:
- Address the searcher’s likely question.
- Explain the service or offer.
- Match the wording of the advertisement.
- Include useful benefits and evidence.
- Answer common objections
- Provide a clear prompt.
- Work well on mobile devices.
- Make it easy to enquire, call, book, or buy
For a service-focused query, direct visitors to the relevant SEM services page. For wider educational searches, a useful guide may be more appropriate than a sales-focused page. This maintains the message positioned before you move on to measurement.
If you send every keyword to your homepage, users may have a bad experience, and it becomes harder to see which services or search intents are working.
- Measure Keyword Quality, Not Only Clicks
Monitor metrics that show both advertising performance and business value. These may include:
- Impressions
- Click-through rate (CTR)
- Cost per click (CPC)
- Conversions
- Conversion rate
- Cost per conversion
- Qualified leads
- Sales opportunities
- Customer acquisition cost
- Revenue
- Return on ad spend (ROAS)
A keyword with a high click-through rate might still lose money if it brings in visitors who don’t become leads or customers. Sometimes, a keyword with fewer searches is better if it brings in good enquiries at a fair cost. Before concluding, confirm that conversion tracking is working correctly. Review performance over a period that reflects your sales cycle and conversion volume. Record major changes to budgets, targeting, ads, bidding, or landing pages so you can interpret performance accurately. From there, use attribution to see how keywords contribute across the journey.
Remember, more than one keyword or channel can help lead to a conversion. Use the right attribution models to see how different keywords, ads, or channels contributed. Consider multi-touch attribution or review conversion paths in your analytics to understand better how keywords affect the full customer journey.
Common SEM Keyword Research Mistakes
Avoid these common errors:
- Choosing keywords only because they have high search volume
- Ignoring negative keywords
- Failing to review search-term reports
- Sending every keyword to the homepage
- Combining unrelated search intents in one ad group
- Optimising for clicks without checking lead quality
- Targeting services or locations the business does not offer
- Making major changes before enough conversion data is available
- Using broad keywords without understanding matching behaviour
- Failing to connect keyword performance with sales results
Build a Repeatable SEM Keyword Research Process. Keyword research isn’t just a one-time job. After you launch your campaign, keep doing the following. This ongoing cycle helps connect new search data back to the earlier steps.
- Review new search terms.
- Identify useful keyword variations.
- Add relevant keywords to the correct campaigns.
- Remove or exclude irrelevant traffic.
- Update ad copy when customer language changes.
- Improve landing pages based on user behaviour.
- Compare keyword performance by lead quality and conversion value.
- Document the purpose of each keyword group.
- Record which conversion each group is expected to support.
- Reassess keywords when services, locations, offers, or markets change. A clear, written process makes it easier to grow your campaigns and keep control over relevance, budget, and results.
If you need help planning or improving your paid search campaigns, check out our search engine marketing and PPC management services . As a next step, run a keyword audit of your current campaigns to identify opportunities for improvement. You can also read our detailed guide to SEM campaign measurement or book a consultation about strategies that fit your business goals. Taking action now can help you use these tips and get real results.
Frequently Asked Questions About SEM Keyword Research
How Many Keywords Should an SEM Campaign Have?
There is no fixed ideal number of keywords. Start with a focused group of relevant terms that you can organise, create suitable ads for, and monitor effectively.
Expand the list when search-term data, conversion performance, and business goals support additional targeting.
Are High-Volume Keywords Always Best?
No. Search volume does not show whether a query will produce qualified customers.
Relevance, search intent, competition, cost, conversion rate, lead quality, and customer value should additionally influence keyword selection.
How Often Should SEM Keyword Lists Be Reviewed?
Review search terms regularly after launch, especially when the campaign is new, spending is high, or irrelevant traffic is appearing.
The right review frequency depends on traffic volume, campaign maturity, budget, conversion data, and the potential risk of wasted spend.
What Is the Difference Between a Keyword and a Search Term?
A keyword is the term or group of terms an advertiser targets in an SEM campaign. A search term is the actual phrase a person enters into the search engine.
Search-term reports help advertisers understand how targeted keywords are matching real user searches and whether exclusions or new keyword ideas are needed.
Should Informational Keywords Be Used in SEM Campaigns?
It depends on the campaign objective. Informational keywords may be useful when the business wants to educate potential customers, build awareness, or support a longer buying journey.
However, they may produce fewer immediate conversions than commercial or transactional keywords. Evaluate them based on the role they play and the business outcome they are expected to support.
How Do I Find High-Intent SEM Keywords?
Look for searches that show a clear need, service interest, location, comparison behaviour, or preparedness to take action. Examples may include terms containing words such as “hire,” “agency,” “service,” “consultant,” “quote,” or a relevant location.
Always validate intent by reviewing the search results, competition, landing-page fit, and actual conversion data.
Key Takeaway
SEM keyword research is about finding search terms that matter, not just making the biggest list. The best approach uses customer language, search intent, keyword tools, search-term data, negative keywords, focused campaigns, relevant landing pages, and conversion tracking.
The goal is to find searches that fit your offer and are likely to bring in qualified leads, sales, or other valuable results.
To connect keyword research with business results, see our guide to measuring SEM campaign performance.
Editorial note: Verify all service claims, contact details, internal links, platform references, and campaign examples before publishing.