SEO glossaryUpdated

What is keyword difficulty?

Keyword difficulty (KD) is a score, usually from 0 to 100, that estimates how hard it is to rank on the first page of Google for a keyword. Each tool calculates it differently, but most rely heavily on the link authority of the pages currently ranking. It is a useful filter, not a verdict: it ignores content quality, intent fit, and SERP features, so always check the actual results.

Keyword difficulty is one of the most used metrics in SEO and one of the least understood. This entry explains how it is calculated, how to interpret ranges, and what it leaves out.

By , Founder, SerionFlow

What we measured ·

What Google shows for "keyword difficulty" right now

Method: Live Google results (United States, desktop, English) for "keyword difficulty" retrieved through DataForSEO's SERP API on 2026-10-22. Page types are our own classification of each ranking URL.

The top 8 organic results for "keyword difficulty" were 6 free tools, 1 product or service page, 1 guide or explainer. The first three were ahrefs.com, www.semrush.com, seranking.com.

Google showed an AI Overview for this query, citing 3 source domains including ahrefs.com, www.semrush.com, www.seo.com. Pages that state the answer directly and early are the ones an Overview can quote.

People Also Ask listed: "What is a good keyword difficulty score?"; "How can I check the difficulty of a keyword?"; "What are the four types of keywords?"; "What does keyword difficulty mean in Semrush?". The sections below answer the ones within this page's scope.

Top organic results for "keyword difficulty", 2026-10-22
PositionDomainPage type
1ahrefs.comFree tool
2www.semrush.comFree tool
3seranking.comFree tool
4www.seoreviewtools.comFree tool
5moz.comFree tool
6backlinko.comFree tool
01

How tools calculate it

Methods vary by provider.

Keyword difficulty by tool (summary of public descriptions)
ToolMain inputs
AhrefsReferring domains to the top 10 ranking pages
SemrushAuthority and link signals of ranking pages, plus SERP factors
MozPage and domain authority of ranking pages, with CTR considerations
DataForSEOModelled from ranking pages' link and domain metrics
02

Interpreting the score

As a rough guide, scores below about 20 to 30 are realistic for newer sites, 30 to 60 need solid authority and content, and above 60 typically need strong domains and many referring links. These bands differ between tools, so compare scores within one tool rather than across tools. For this site's planning, we preferred keywords with a DataForSEO difficulty of 45 or below unless the topic was strategic.

03

What the score misses

Difficulty scores do not measure how well the current pages answer the query, whether they match the intent, how outdated they are, or how many clicks SERP features absorb. A keyword with a high score can have weak, generic top pages; a low score can hide a results page dominated by official documentation. Brand-new topics can show low difficulty simply because few pages exist yet.

04

Judging difficulty from the SERP

Open the results for each shortlisted keyword. Signs of real opportunity: forum threads, outdated posts, thin pages, or small sites ranking. Signs of real difficulty: the top results are all major brands, official documentation, or tools you cannot match. Combine the score with this review and with your own site's strength in the topic.

05

Difficulty and your site

Difficulty is relative to your site. A domain with strong topical authority can rank for higher-difficulty terms in its subject than a general site could. Check which difficulty levels you already rank for in Search Console and your keyword tool, and target slightly above that level as your authority grows. SerionFlow weighs difficulty together with relevance, intent, and trend when ranking opportunities, rather than filtering by score alone. SerionFlow is the wrong tool for checking difficulty scores one keyword at a time; a keyword tool shows them directly.

Clear answers

Frequently asked questions

What is a good keyword difficulty score?

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It depends on your site. For newer sites, scores under about 20 to 30 in most tools are realistic starting points; stronger sites can target higher.

How can I check the difficulty of a keyword?

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Use a keyword tool's difficulty score as a first filter, then review the actual results page to judge the strength and quality of the ranking pages.

About the author

· Founder, SerionFlow

Shadrack builds SerionFlow's site research, page generation, and Search Console tooling, and runs the free tools these guides pair with. Search Console figures cited on these pages come from serionflow.com's own property.

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