In digital marketing and search engine optimization (SEO) The world of choosing the right keywords pretty much determines success or failure. But the question remains: how hard is it to rank for a particular keyword? That's where Ahrefs' Keyword Difficulty (KD) indicator comes in handy. It uses a score from 0 to 100 to visualize the intensity of competition, which seems simple but hides many details and limitations. In this article, we will analyze how KD is calculated, what it means in practice, and how to properly understand and utilize it in different scenarios.

What is Ahrefs Keyword Difficulty and how is it calculated?

Ahrefs Keyword Difficulty (KD) shows how difficult it is to rank on the first page of Google for a particular keyword. It is scored on a scale of 0 to 100; the higher the score, the more competitive it is.

Below is a vertical table that breaks down the range of Ahrefs Keyword Difficulty (KD) scores, what they mean, and how to respond to them:

KD range	Level of competition	hidden meaning	proposed direction
0-10	very low	Ranking with only very few backlinks	Ideal for new sites or low weight pages
11-30	low to medium	Needs some backlinks and solid content	Ideal for growing sites with a basic SEO foundation
31-70	middle to high	Competition is fierce; top pages have strong outbound links	Need for external link building, quality content and subject matter authority
71-100	very high	Dominated by authoritative domains	Be selective in your attempts; build authority before attacking

Ahrefs calculates this by looking at how many backlinks the top ranking page already has. For example, in this case (see screenshot below), it shows that I need more than 400 referring domains to rank in the top 10 for the keyword "SEO agency".

Based on this data, I can conclude that the term "SEO agency" is very competitive (which makes sense), but that doesn't tell me much beyond that.

This does not guarantee that even if I get or buy more than 400 backlinks, I will rank in the top 10 because Ahrefs does not indicate the quality of the outbound links, average DR Score, natural traffic, relevance, type of outreach (editorial, sponsored, forum, etc.).

Plus, search engines (especially Google) take a lot of other factors into account, such as Google's E.E.A.T., and content quality,Technology SEO, overall subject matter authority, and other content that may be covered in the RankBrain system.

Ahrefs KD Score Doesn't Tell the Whole Story

If anyone on the Ahrefs team reads this guide, they'll probably agree that I'm not trying to confuse anyone; my main goal is to help companies avoid spending the majority of their SEO budgets on content that's going to take a long time to see results.

keep in mind
When Ahrefs says the keyword difficulty is high, it doesn't specify for whom it is high.

I mean, Ahrefs shows that a certain keyword is "hard to rank for", but it doesn't explain who it's hard for. Is it for new sites? Large authority sites? Niche blogs? That part of the information is missing. the Ahrefs KD is just a number, it doesn't take into account the actual situation.

I'll give you a simple example.

A site focused entirely on insectivorous plants, posting original research, tutorials, care guides, and user-submitted experiments, it's entirely possible to go beyond a generalized gardening blog or large-scale lifestyle website.

Even if the other person's DR is 90 and this site is only 18, topic depth can win out if the content is highly aligned with the search intent.

Do you know what happened to Forbes at the end of 2024?

For a long time, well-known websites like Forbes were able to easily gain traffic based on their reputation alone. They wrote about almost everything, including tech topics and diet pills,VPN etc., mainly to make money through affiliate links.

Even if the content isn't great, they still rank high on Google because of the branding.

In September, however, Google finally stepped in after releasing the Helpful Content Update: "We're no longer rewarding sites that abuse their authority to push poor quality, off-topic content."

Forbes isn't the only one being rippled, but they are one of the most recognizable and representative cases.

That's why I always say: relevance can't be faked. Authority may get you in the door, but depth of subject matter and reader-centered content is what keeps you in the room.

Ahrefs, KD, when does it help?

As I said, KD is not the metric I rely on the most, but there are situations where I would consider it.

For example, when I'm doing high-volume keyword research and I want to filter quickly, I refer to the KD, which I don't use to decide which keywords to target; I just use it to save time. For example, if I'm exporting 5,000 keywords, I'll quickly filter out terms with a KD above 70 to exclude obvious high-authority areas.

I would then go through these filtered results one by one and manually check the SERPs. i look at who is ranking, noting depth of content, type, etc. and look for gaps.

Remember, low KD does not equal low competition, but high KD almost always means competition is hard. Instead of wasting time on impossible goals, focus on directions that are more likely to work.

Examples from the SERP that caught my attention

Sometimes you'll see a keyword with an Ahrefs KD of 0-10 and think, "Great, easy peasy." A quick glance at the SERPs seems to support your judgment: a few sites with DRs below 10 are solidly in the top ten.

But look a little closer and you'll see that these smaller sites use exact match domain names, such as sites like ladentalclinic.com.com, which rank for the term "Dental Clinic Los Angeles".

Another example: very segmented keywords, such as "how to use Python for NLP and semantic SEO" (how to use Python (doing NLP and semantic SEO), often with very low KD, and very often this is indeed accurate. The reason for this is simple: there aren't many high-quality results on Google for these kinds of specialized topics, mainly because only a few people have enough expertise to write well.

However, these types of keywords usually fall into the TOFU (top of the funnel) stage. They're great for engaging experienced readers early in the research, but may not necessarily translate directly into sales or leads.

KD scores tend to be more accurate in non-English speaking countries (e.g. Armenia) because overall SEO perception is still evolving. Competition is naturally lower in markets where many people still don't understand backlinks or quality content.

Therefore, if you pick the right keywords, it's entirely possible to rank in just a few days, even without outbound links or a strong domain authority.

I've also noticed that in many cases when you see a keyword with a high KD but low authority sites in the top 10 or even top 5, this is usually temporary. Especially when stronger domains are also targeting the same keyword, these low authority sites can quickly fall off.

Finally, referring to the case of Digital World Institute, I can safely say that even if you can write valuable content and choose keywords with a KD of 0, don't expect instant results if the site is new and not trusted by Google. In many cases, it can take at least 6 months to see significant rankings even for low competition terms.

summarize

Overall, Ahrefs KD is a practical reference indicator that can help us quickly do the initial screening in the vast sea of keywords. But it is not the final answer. The real decision is whether we can getrankingsThe ones that remain are depth of content, relevance, subject matter authority, and an accurate grasp of search intent.KD Scores will give you a sense of direction, and it's your content and execution that will open the door to rankings. Instead of obsessing over scores, focus on building valuable, problem-solving content, that's the core of winning long-term traffic and trust.

Contact Us
Can't read the tutorial? Contact us for a free answer! Free help for personal, small business sites!	Customer Service
① Tel: 020-2206-9892
② QQ咨询：1025174874
(iii) E-mail: info@361sale.com
④ Working hours: Monday to Friday, 9:30-18:30, holidays off