Understanding KD Scores: What it is and Why it’s Important in SEO

Everybody knows that the search volume of a keyword is an essential SEO metric.

But it’s equally important to know what it takes to rank for that keyword. That’s why every keyword research tool operates with a metric called Keyword Difficulty.

In this blog, we’ll take a closer look at what it is, how it’s calculated, and why it’s so important when doing keyword research.

What is keyword difficulty?

Keyword difficulty is an SEO metric that estimates how difficult it is to rank for a keyword.

The higher the keyword difficulty, the harder it is to rank on the 1st SERP (Search Engine Results Page) due to the high competition of the ranking websites.

There are many factors (both external and internal) that influence the degree of keyword difficulty, including the quality of the competitors’ pages and the quality of your page.

The term is usually used with two slightly different meanings:

  • Keyword difficulty as a metric on a scale from 0 to 100
  • Keyword difficulty as a general term taking into account all the aspects (both internal and external)

Keyword difficulty as a metric

Very often, the term keyword difficulty refers to the metric used in SEO tools that scores the ranking difficulty of each keyword on a scale from 0 to 100.

It works quite simply: the higher the score, the more difficult it is to rank for the keyword.

In KWFinder, the difficulty scores are also differentiated by colour to help you navigate through the list of keywords more easily:

How is keyword difficulty calculated?

When quantifying the competition of a keyword into a metric, there’s only one aspect of the website quality taken into consideration – the backlink profile.

Each website ranking in the 1st SERP is given a certain score based on the quality and quantity of the backlinks.

The authority of your competitors can be measured in various ways. In KWFinder, you can find the Link Profile Strength metric that estimates the quality of the website’s link profile.

The calculation is based on the selected metrics by Moz:

  • Domain Authority
  • Page Authority
  • Citation Flow
  • Trust Flow

After that, the average score is calculated to give one final value that gauges how hard it is for a website to break into the 1st SERP for this term.

Keyword difficulty as a general term

When estimating how hard it will be for you to rank for a certain keyword, you need to consider a couple of factors, both internal and external.

The most important factors are:

  1. Your competitors

SEO is all about outranking your competitors.

So looking at the competing websites is one of the best ways to estimate the difficulty of ranking for a keyword. You should focus on the quality of their:

  • content quality
  • on-page optimization
  • backlinks

Backlinks are still a very important ranking factor, so they provide a good estimation of how hard it will be to rank for a keyword.

It’s also the only factor that can be measured and put into a metric. That’s why estimating the keyword difficulty is often reduced to finding out how authoritative (in terms of link profile) your competitors are.

The more authority the websites ranking for a keyword have, the harder it will be for you to outrank them.

  1. Authority of your website

Besides the competitors, your ability to rank for a keyword is also determined by the authority of your own website.

This is especially important to keep in mind if you have a new website. Even if the competition for a keyword is relatively low and you write a great piece of content, you probably won’t rank with your brand new site with zero backlinks.

  1. Quality of your content

There’s another side of the coin – the authority of your website won’t help you if the quality of your content is not able to compete with the pages ranking in the 1st SERP.

You should ask yourself these questions:

  • How hard will it be for me to write content that is of equal or better quality than the competing pages?
  • Can I provide the same level of expertise as my competitors?
  • Is there any benefit I can provide to the readers when compared to the competitors? (quality, depth of knowledge, unique data, visuals, etc.)

All of these are subjective factors that contribute to the overall level of keyword difficulty in your specific case.

  1. Search intent

Last but not least, you should consider the search intent behind the search query.

In other words – what kind of content are people who used a particular keyword expecting?

There are 4 basic types of search intent:


So, how to find out the search intent behind the keyword?

The easiest way is to “reverse engineer” it by looking at the search results and see what kind of pages are ranking for the keyword.


Why should you care about keyword difficulty?

Many beginner bloggers choose a keyword, write great content and optimize the page only to find out that they’re not ranking at all. The most common reason – the competition is too fierce.

This is why your keyword research process should always account for keyword difficulty.

By keeping an eye on keyword difficulty:

  • You’ll get a good overview of what are the “hot” keywords and “big” players in your niche
  • You’ll be able to identify alternative keywords in your niche that you have an actual chance to rank for
  • You’ll be able to save a lot of time by focusing on keywords that can bring you results even if your website does not have much authority yet

How to use keyword difficulty in your SEO strategy

  1. Look at the big picture

Keyword difficulty is only one of the aspects you should consider when doing keyword research.

The other two important aspects are the popularity of the keyword and relevance.

If there’s low difficulty but the keyword has no search volume, you won’t get any traffic.

On the other hand, without relevance, you will not rank for the keyword even if the difficulty metric is low because the search intent doesn’t match your type of content.

  1. Analyze the SERP results

Never rely on a single number given by a keyword tool. The keyword difficulty metric is there to give you a quick overview – not to replace the competitor research. In other words – SERP analysis is non-negotiable.

Besides the difficulty metric, always look at the SERP results and the actual websites that rank for the keyword.

You’ll learn much more about the search intent, the type of content that ranks for the keyword as well as how deeply your competitors cover the topic.

You may also notice, for example, that the top positions are taken by “big brands” (e.g. Amazon, Pinterest, YouTube) with high authority, which may not be reflected in the 0-100 metric but will influence your ability to rank for the keyword at the top.

That being said…

  1. Don’t be afraid of high difficulty

The keyword difficulty metric alone shouldn’t deter you from trying to rank for a keyword with medium or higher difficulty.

It’s more about getting a general sense of what you’re up against and determining what you need to do to make your page a viable competitor.

Here’s a couple of things that can help your rank for a highly competitive keyword:

  • Outstanding content – you may outrank highly authoritative competitors with quality content that shows better expertise and covers the topic in a much deeper way (see the 10x content strategy)
  • Topical relevance – having a narrowly oriented website with quality internal links can help you outrank authoritative websites that cover the topic only sporadically and rank mostly due to their overall brand authority
  • Quality backlinks – a high number of quality backlinks to a specific page can help you rank for that page even if your overall domain authority is lower


  1. Compare the values within one tool

There are many keyword research tools out there and each may use a different backlink database or a different way of calculating the keyword difficulty.

Therefore, the keyword difficulty scores may differ from tool to tool and it’s important to compare the values within one tool.

In Conclusion

Hopefully, now you can understand what exactly Keyword Difficulty is, and how it affects your SEO. 

Good Commerce can help you achieve your search engine optimization goals in several ways. We will evaluate your website and develop a tailored SEO strategy that aligns with your business goals.

Ready to partner with Good Commerce and improve your website SEO? Let us tailor an SEO strategy that provides long-term organic growth for your business. Contact us to book a Brand Discovery session and let’s start achieving your business goals together.

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