Keyword Difficulty in 2027: What the Score Means and How to Use It
keyword research, explainedHey brother. Keyword difficulty is a number an SEO tool gives a keyword to estimate how hard it is to rank for. It is not a Google metric, and every tool calculates it differently. This guide shows what the score really measures, where it misleads, and how to use it as a first filter without trusting it blindly.
- vendor definitions quoted
- how to double-check a score
- no ranking promises
| keyword | score | my read |
|---|---|---|
| dentist | hard | too broad, skip |
| emergency dentist toronto | medium | check the results page |
| how long do fillings last | easy | write a guide |
| teeth whitening cost toronto | easy | price page, check intent |
// example data: invented scores for a dentist in Toronto, shown as easy, medium and hard. Not real tool output.
What Keyword Difficulty Means
It is a tool’s estimate of how hard a keyword is to rank for. A higher number means more competition, and the number is only as good as the method behind it.
Google does not publish a keyword difficulty score. I looked at Google’s Keyword Planner help page, and it describes search volume estimates and ad costs, not organic difficulty. I also found no Google Search Central page that defines the term. So the number always comes from a vendor.
Vendors define it in their own words. Ahrefs says its KD “represents an estimation of how hard it would be to rank on the 1st page of Google”. Semrush’s glossary says keyword difficulty is “the estimation that shows how difficult it would be to compete in organic search for a certain keyword”.
Both are estimates. Neither is a prediction for your site. That matters, because a score does not know how old your site is, how good your page will be or how well it fits the search.
Two Vendors, Two Methods
The same keyword can get different scores in different tools because the recipes are not the same.
| Ahrefs (vendor-stated) | Semrush (vendor-stated) | |
|---|---|---|
| What the score claims | An estimation of how hard it is to rank on the first page | An estimation of how hard it is to compete in organic search |
| What it is based on | The number of referring domains of the top 10 ranking pages | Not stated in the glossary entry I read |
| Scale | 0 to 100, with 100 the hardest | Not stated in the glossary entry I read |
| Stated limit | Does not consider on-page factors, and should not be your only guide | Higher means harder to compete with current top sites |
// vendor-stated, checked 11 Nov 2026 on Ahrefs’ help article about KD and Semrush’s glossary. Other tools use other methods, so compare scores only within one tool.
Notice Ahrefs’ own advice: do not base all your SEO decisions on KD alone, and use it as a first filter. I agree with that, and I would say the same about every tool.
What a Score Cannot See
A single number leaves out most of what decides who wins.
Your page
The score describes the competition, not your content. Google’s helpful content questions, such as original information and a complete description of the topic, apply to your page.
Search intent
A keyword can be easy but wrong for your page type. If every result is a product page, your guide may never fit. See search intent.
Location and language
Google says results depend on hundreds of factors, such as location, language and device. A national score may not match your town.
Time
Competitors publish and improve. A score can move after a few months. Re-check before a big investment.
The Score as a First Filter
Use the number to shorten a list, then use your eyes to choose from what is left.
A list of keywords
from your research
Drop the extremes
very broad, very hard
Check intent
does the type fit your page?
Read the results
who ranks, and how well
Compare with your site
Search Console data
Choose and write
or plan links first
// my working order. Only the idea of a first filter comes from a vendor’s advice, quoted above.
How to Use Keyword Difficulty Without Being Fooled
Seven steps from a raw list to a short, sensible target list.
- Collect the keywords. Use keyword research for beginners and Google autocomplete to build a list.
- Pick one tool and stay with it. Scores differ between tools, so compare only within one. Free and paid tools both work.
- Remove the obvious mismatches. Drop broad single words and phrases that make no sense for your business.
- Check the intent of what is left. Search each keyword and see which kinds of pages appear. My guide to SERP analysis shows how.
- Look at who ranks. Are they big brands, small local sites or forums? A small site beats a forum more often than it beats a national brand. That is my experience, not a rule.
- Check your own data. Search Console reports average position as the average position in Search results for the page or query. If you already show on page two for a keyword, it is a better bet than a fresh one.
- Decide the effort. Medium or hard keywords may need links as well as content. Read what backlinks are and see my off-page SEO work if links are the gap.
Mistakes People Make With the Score
Most come from treating a rough estimate as a fact.
- Believing low means easy. It means the tool sees little competition. Quality, intent and your site still decide the result.
- Believing high means impossible. It means harder. A good niche page can still earn visits from the long tail.
- Comparing scores across tools. Different methods give different numbers. Stay inside one tool.
- Ignoring intent. An easy keyword for the wrong page type is a waste of a week.
- Chasing the lowest numbers only. A keyword nobody wants is easy for a reason. Pick words that bring people who could become customers.
How to Check Your Choice Worked
Let your own data answer after the page has had time.
- After some weeks, open the Performance report and check impressions and average position for the target keyword.
- If impressions grow but clicks do not, improve the title and the first lines.
- If you do not show at all, re-read the results page for a mismatch in page type or depth.
- Keep a log of the score you saw at the time and the result, so you learn how reliable your tool is for your niche.
Google says some changes take a few hours and others several months, and that no one can guarantee a #1 ranking. So treat any difficulty score as a guide, not a forecast.
Questions People Ask Me
Is keyword difficulty a Google metric?
No. Google does not publish a keyword difficulty score. The number comes from SEO tool vendors, each with its own method.
What is a good keyword difficulty score?
There is no universal answer, because tools use different scales and methods. Ahrefs uses a 0 to 100 scale where 100 is hardest. Judge a score by comparing keywords inside one tool.
Why do tools give different scores for the same keyword?
Their methods differ. Ahrefs says its KD is based on the referring domains of the top 10 ranking pages, while Semrush’s glossary does not state its basis.
Does keyword difficulty consider content quality?
Ahrefs says its KD does not take on-page factors into account. Read the actual results to judge quality.
Can a small site rank for hard keywords?
It is possible, but I would not plan on it. Start with specific, lower-competition phrases and build from there. Nobody can promise a ranking.
Send Me Your Keywords. I’ll Pick the Winners.
I choose realistic targets for small sites. Ask a cheap SEO expert for a first look, or see my off-page SEO service if links hold you back.
Sources and Last Check
- Google Ads Help: About Keyword Planner (search estimates and ad cost; no organic difficulty)
- Ahrefs Help: What does KD stand for in Keywords Explorer (vendor-stated definition and limits)
- Semrush Knowledge Base: Glossary (vendor-stated definition)
- Google Search Central: How Google Search works (location, language, device)
- Search Console Help: Performance report (Search) (average position)
- Google Search Central: Creating helpful, reliable, people-first content
// last checked 11 Nov 2026. Vendor definitions are vendor-stated. The method, the mistakes and the experience remarks are my own.