What is keyword research and why it matters
Keyword research is the process of finding and analyzing the words and phrases people type into search engines. It is the single most important step in content marketing because it determines whether anyone will ever find your content.
You can write the most brilliant article in the world, but if nobody is searching for the topic it covers, you will get zero organic traffic. Conversely, if you target a keyword that millions of people search for but thousands of websites already cover, your chances of ranking on page one are slim.
Keyword research helps you find the sweet spot: topics with meaningful search demand that you can realistically rank for, given your website's current authority. As we covered in Module 1: SEO Fundamentals, on-page SEO is where you have the most control — and it starts with choosing the right keywords.
Think of it this way. Writing without keyword research is like opening a store without knowing what customers want to buy. You might get lucky, but more likely you will invest time and resources into content that nobody is looking for. Keyword research is your market research — it tells you exactly what your audience wants to learn, buy, or solve.
Writing without keyword research is like opening a store without knowing what customers want to buy. It is your market research — it tells you exactly what your audience wants.
The three core metrics
Every keyword research tool provides three fundamental metrics. Understanding what they mean — and their limitations — is essential.
Search volume
Search volume represents the average number of times a keyword is searched per month. A keyword with 10,000 monthly searches gets roughly 333 searches per day. Higher search volume means more potential traffic, but also typically more competition.
Important nuances about search volume:
- It is an estimate, not an exact count. Different tools report different volumes for the same keyword because they use different data sources and methodologies.
- Seasonality matters. "Christmas gifts" might show 50,000 monthly searches, but that is averaged across the year. In December, it could be 200,000. In July, nearly zero.
- Search volume does not equal traffic potential. A keyword with 5,000 monthly searches will not send you 5,000 visitors even if you rank number one. Click-through rates vary by position, and many searches end without a click (zero-click searches).
- Related keywords add up. If you write a comprehensive article targeting "best project management tools," you might also rank for "top project management software," "PM tools comparison," and dozens of related phrases. The total traffic can far exceed the volume of your primary keyword.
Keyword difficulty
Keyword difficulty (KD) is a score, typically from 0 to 100, that estimates how hard it will be to rank on the first page for a given keyword. A KD of 10 means relatively easy. A KD of 80 means extremely competitive.
Most keyword difficulty scores are calculated based on the backlink profiles of the pages currently ranking. If the top 10 results for a keyword all have hundreds of high-quality backlinks, the KD will be high. If the top results are from smaller sites with few backlinks, the KD will be low.
The practical application: if your website is new or has low domain authority, focus on keywords with a difficulty score under 30. As your site builds authority through consistent content and link building, you can gradually target more competitive keywords.
One caveat: keyword difficulty scores are imperfect. They mainly measure backlink competition and do not fully account for content quality, E-E-A-T, or topical authority. A website with strong topical authority in a niche can sometimes rank for keywords that the difficulty score says should be out of reach.
Cost per click (CPC)
CPC shows how much advertisers are willing to pay for a click on a Google Ads result for that keyword. While CPC is an advertising metric, it is incredibly useful for content marketers because it indicates commercial value.
A keyword with a CPC of $15 tells you that businesses find visitors searching for that term valuable enough to pay $15 per click. If you can rank organically for that keyword, each visitor you attract represents $15 in equivalent ad spend saved.
CPC helps you prioritize: all else being equal, a keyword with a $12 CPC is more commercially valuable than one with a $0.50 CPC. This does not mean you should ignore low-CPC keywords — informational content builds authority and brand awareness — but when choosing between similar keywords, CPC can be the tiebreaker.
Understanding search intent
Search intent is the reason behind a search query. It is arguably more important than search volume, because ranking for a keyword only matters if your content matches what the searcher actually wants. Google has become very good at understanding intent, and it heavily penalizes content that does not match.
There are four primary types of search intent:
Informational intent
The searcher wants to learn something. Examples: "how does photosynthesis work," "what is keyword research," "history of the Roman Empire." These queries typically start with how, what, why, when, or who.
Informational content includes tutorials, guides, explanations, and educational articles. It tends to have high search volume but lower commercial value. Its primary role in your strategy is building authority, trust, and brand awareness — exactly the E-E-A-T signals we discussed in Module 1.
Commercial investigation intent
The searcher is researching options before making a purchase. Examples: "best CRM software 2026," "Tonaily vs competitors," "top running shoes for flat feet." These queries often include words like best, top, review, comparison, or vs.
Commercial content includes comparison articles, product roundups, and in-depth reviews. It has moderate to high commercial value and is often where content marketing directly drives revenue. Understanding how your competitors approach these keywords (Module 3) is critical.
Transactional intent
The searcher is ready to take action — buy something, sign up, or download. Examples: "buy Nike Air Max 90," "Tonaily pricing," "download free SEO checklist." These queries often include buy, price, discount, download, or sign up.
Transactional pages are typically product pages, pricing pages, or landing pages. They have the highest commercial value but often the most competition.
Navigational intent
The searcher wants to reach a specific website or page. Examples: "Facebook login," "Tonaily blog," "YouTube." The searcher already knows where they want to go and is using Google as a navigation tool.
You generally cannot rank for navigational queries unless they are for your own brand. Focus on informational and commercial keywords for your content strategy.
Finding low-competition keywords
The key to building organic traffic, especially for newer websites, is finding keywords with decent search volume and low competition. Here are proven strategies:
Go specific. Instead of targeting "project management," try "project management for remote design teams" or "agile project management for startups under 10 people." Specific queries have less competition and often higher conversion rates because they match a very specific need.
Use question-based keywords. Queries starting with "how to," "why does," or "can you" often have lower competition than their shorter counterparts. "How to write a business plan for a restaurant" is easier to rank for than "business plan."
Target emerging topics. New technologies, trends, and events create keyword opportunities that established sites have not yet covered. If you can identify these early, you can establish yourself as the go-to resource before competition intensifies.
Analyze "People Also Ask" boxes. Google's "People Also Ask" section reveals related questions that searchers have. These are often lower-competition keywords that make excellent article sections or standalone pieces.
Look at forum content. Reddit, Quora, and industry forums surface real questions from real people. If a question gets asked repeatedly but no comprehensive guide exists, that is a content opportunity.
Tonaily's Keyword Database makes this process fast: filter by difficulty under 30 and minimum volume of 100 to surface winnable keywords in seconds.
Long-tail keyword strategy
Long-tail keywords are longer, more specific search phrases that individually have lower search volume but collectively represent the majority of all searches. Here is why they matter:
Lower competition. "SEO" has a keyword difficulty of 95+. "SEO for small law firms in Texas" might be 15. Long-tail keywords let smaller sites compete where larger sites do not bother.
Higher conversion rates. Someone searching "running shoes" is browsing. Someone searching "best cushioned running shoes for knee pain women size 8" is ready to buy. Long-tail queries indicate higher intent and specificity.
Cumulative traffic. One long-tail keyword might bring 50 visits per month. But if you target 100 long-tail keywords in your niche, that is 5,000 monthly visitors from a portfolio of articles, each with minimal competition.
Topical authority building. When you cover a topic from every angle — addressing broad questions and niche sub-questions — Google recognizes your site as a comprehensive authority on that topic. This makes it easier to rank for the more competitive head terms over time. We cover this in depth in Module 5: Topical Authority.
The ideal content strategy combines both head terms and long-tail keywords. Target competitive terms with pillar pages, then create dozens of long-tail articles that support those pillars.
The ideal content strategy combines both. Target a few competitive head terms with your best, most comprehensive content (pillar pages). Then create dozens of long-tail articles that support those pillars, linking back to them and covering related subtopics in depth. Link Boost can help you build these internal connections automatically.
How Tonaily's keyword database works
Tonaily provides access to a database of over 2 million keywords, built on millions of real Google search queries. Here is how to use it effectively:
Search and discover. Enter a seed keyword related to your niche, and Tonaily returns related keywords with their search volume, keyword difficulty, CPC, and trend data. This immediately gives you a list of potential content topics ranked by opportunity.
Filter by opportunity. Use the difficulty filter to show only keywords below a certain threshold. Combine this with a minimum search volume filter to find the sweet spot: keywords with enough traffic to be worthwhile and low enough competition to be winnable.
Understand trends. Tonaily shows search volume trends over time, helping you identify keywords that are growing (opportunities) versus declining (potential dead ends). Targeting growing keywords means your content's traffic potential increases over time.
Group by topic. The database helps you identify keyword clusters — groups of related keywords that can be addressed in a single comprehensive article. Instead of writing separate articles for "what is keyword research," "how to do keyword research," and "keyword research tools," you might write one definitive guide that targets all three.
Export and plan. Export your keyword selections to build a content calendar. Prioritize keywords by a combination of search volume, difficulty, CPC, and relevance to your business goals. Then use Tonaily's Content Generator to start producing articles for your top picks, or let Kira handle the entire workflow autonomously.
The database is updated regularly, ensuring you are working with current data rather than outdated estimates. This matters because search behavior changes — new topics emerge, seasonal patterns shift, and competition levels fluctuate. Pair your keyword research with competitive analysis (Module 3) for maximum impact.