Understanding Keyword Difficulty in SEO Tools

While every SEO software provider uses a proprietary algorithm, the fundamental basis for the keyword difficulty score usually revolves around the link profiles of the top-ranking pages. For instance, a common pattern is to calculate the weighted average of the number of referring domains pointing to the pages currently in positions one through ten. If the top results for a query like ‘best credit cards’ all have thousands of unique domains linking to them, the tool will assign a score close to 90 or 100. This calculation assumes that because Google uses backlinks as a primary ranking signal, you will need a similar or superior link profile to compete. However, these scores are strictly estimates and do not account for every internal ranking factor used by search engines.

In a typical account, you might notice that some tools also weigh the ‘authority’ of the domain itself. For example, if the top results are all from high-authority sites like Wikipedia, Amazon, or The New York Times, the difficulty score increases even if those specific pages have few direct backlinks. This reflects the reality that search engines often trust established brands more than unknown entities. Some platforms also include the search intent and content length of the ranking pages in their calculations. If the top ten results are all 3,000-word comprehensive guides and your page is only 500 words, the ‘real’ difficulty is higher than what a simple link-based score might suggest. Understanding these nuances helps you look past the single number and see the actual competitive landscape.

It is frequent for a user to see a keyword difficulty score of 45 in one tool and 65 in another for the exact same search term. This discrepancy happens because each platform has its own database of the web and its own way of valuing links. One tool might have a larger index of backlinks, allowing it to see more competition that another tool might miss. Additionally, the weighting of factors differs significantly. Ahrefs explicitly states that their KD score is based solely on the number of referring domains to the top 10 pages. In contrast, Semrush includes factors like search volume and the presence of SERP features like featured snippets or image packs, which can make the ranking process more complex.

Another reason for the variation is the frequency of data updates. Search results change constantly, and if one tool refreshed its data yesterday while another has not updated for a month, the scores will naturally differ. For a Shopify store selling niche products like ‘handmade bamboo toothbrushes’, one tool might see the niche as low competition because it hasn’t indexed recent blog posts from competitors. When choosing a tool, the specific number is less important than the consistency of the tool’s logic. It is usually better to stick to one platform for your research so that you are comparing ‘apples to apples’ across your entire keyword list. This consistency allows you to build a reliable internal benchmark for what a ‘hard’ or ‘easy’ keyword looks like for your specific website.

Targeting terms with a high keyword difficulty score is often a long-term play for brand authority. Even if you know you cannot rank in the top three positions within the next six months, creating content for these competitive terms is necessary for building topical authority. For example, a new financial services site must have a page about ‘how to save money’ even if that term has a KD of 85. Without this core content, search engines might struggle to understand the overall theme of your website. These high-competition pages serve as ‘pillar’ content that supports easier, long-tail keywords. You can link from your difficult pillar page to your easier sub-topic pages, passing internal authority throughout your site structure.

In some cases, the high difficulty is worth the effort because the conversion value of the keyword is exceptional. If a keyword has a high cost-per-click (CPC) in Google Ads, it indicates that competitors are willing to pay a premium for that traffic. In this scenario, even ranking on the second page or in the bottom half of the first page can result in valuable leads. You should approach these keywords with a multi-year mindset. Instead of expecting immediate organic traffic, use these pages as landing pages for social media campaigns or email marketing while you slowly build the backlink profile needed to climb the organic rankings. High difficulty does not mean ‘impossible’; it simply means ‘expensive’ in terms of time, content quality, and outreach effort.

Assessing the competition manually

Before committing to a keyword based on a tool’s score, you should perform a manual check of the Search Engine Results Page (SERP). Look for ‘weak spots’ that automated tools might miss. For instance, if you see forum results like Reddit or Quora in the top five, it is often a sign that the keyword difficulty score is overestimating the competition. These platforms rank because there is a lack of high-quality, dedicated content on the subject. If you can provide a more comprehensive and expert answer than a forum thread, you have a high chance of outranking those results regardless of what the SEO tool says about the domain authority of Reddit.

• Check if the top results are actually answering the search intent.
• Look for outdated content in the top 10 positions (older than 2 years).
• Identify if the ranking pages are poorly designed or not mobile-friendly.
• See if there are any ‘low authority’ sites (DR/DA under 30) ranking in the top 10.
• Evaluate if the results are mostly ‘big brands’ that are ranking on name recognition alone.

Effective content planning involves balancing your keyword list between low-difficulty ‘quick wins’ and high-difficulty ‘authority builders’. A common strategy is to allocate 70% of your resources to keywords with a score below 30, and 30% to more competitive terms. This ensures that you are consistently gaining traffic from easier queries while making slow progress on the major terms in your industry. When you find a low-difficulty keyword with decent search volume, it usually indicates a content gap in the market. These are the terms you should prioritize for immediate production because they offer the highest return on investment for your time.

For a typical content audit, you should export your keyword list into a spreadsheet and sort it by the keyword difficulty score. Then, cross-reference this with the search volume and the relevance to your business. A keyword with a KD of 10 is not useful if it doesn’t lead to a conversion or a newsletter sign-up. The goal is to find the ‘sweet spot’ where the difficulty is manageable for your site’s current strength, the volume is high enough to matter, and the intent aligns with your products or services. As your website grows and gains more backlinks, your ‘manageable’ KD threshold will increase, allowing you to target more competitive terms over time.

While the keyword difficulty score is helpful, it should never be the only factor in your decision-making process. Search intent and topical relevance are often more important for actual rankings. Google’s systems are increasingly focused on ‘Helpful Content’ and E-E-A-T (Experience, Expertise, Authoritativeness, and Trustworthiness). If you are a certified plumber writing about ‘how to fix a leaky faucet’, you might outrank a general news site with a higher domain authority because of your topical relevance. The difficulty score cannot measure your personal expertise or the unique value you bring to a topic, which are factors that search engines prioritize.

Furthermore, the score does not account for localized search results. If you are a local business in Chicago, the national keyword difficulty for ‘landscaping services’ might be very high, but the difficulty to rank within the Chicago geographic area might be significantly lower. You must also consider the ‘SERP features’ that take up space. A keyword might have a low difficulty score, but if the first page is covered in ads, local map packs, and ‘People Also Ask’ boxes, the actual organic click-through rate will be very low. Always look at the layout of the search results page to see how much ‘real estate’ is actually available for organic links before deciding on a target.

If you decide to target a keyword with a high difficulty score, your content must be significantly better than what currently exists. This is often referred to as the ’10x Content’ rule. You should analyze the top three results and identify what they are missing. Perhaps they lack original data, or maybe their images are low quality. By providing a more comprehensive, better-designed, and more up-to-date resource, you give search engines a reason to test your page in the top positions. Over time, as users spend more time on your page and share it with others, your authority for that specific topic will grow, making the high difficulty score less of a barrier.

• Low Difficulty (0-30): Easy to rank with basic on-page SEO and minimal links.
• Medium Difficulty (31-50): Requires high-quality content and some targeted backlink building.
• High Difficulty (51-70): Needs significant authority and a strong link-building campaign.
• Very High Difficulty (71-100): Reserved for established brands with massive link profiles.