Keyword difficulty

Why it matters

Keyword difficulty is the number that decides where a content budget goes. Pick only easy terms and you rank for things nobody buys from. Pick only hard ones and you spend a year producing pages that never reach the first page. The score is the fastest way to sort a list of candidate terms into the ones worth attempting this quarter.

It matters just as much to know what the number is not. It is an estimate produced by a vendor, not a measurement taken from Google.

How it works

Every major SEO tool publishes a keyword difficulty score, usually on a scale of 0 to 100. The inputs differ by vendor, but the common core is the strength of the pages currently ranking on page one, judged mostly by how many other sites link to them. A term where the top ten results are all widely referenced pages scores high. A term where the top ten are thin or sparsely linked scores low.

Two consequences follow from that method, and both are routinely missed.

The score describes the competition, not the term. It is a snapshot of who currently ranks. If three of those pages are abandoned, the real difficulty is lower than the score suggests, and the score will not notice until the rankings change.

It is link-weighted, so it underweights intent. A term can score low because its ranking pages have few links, while being almost impossible for you specifically, because the results are all on a different kind of site than yours. Difficulty and relevance are separate questions, and only one of them is in the number.

Google's own documentation is worth reading here. Its guide to ranking systems names the systems it uses, including BERT, RankBrain, neural matching, link analysis and PageRank, freshness systems and others. No keyword difficulty score appears anywhere in it, because none exists at Google. The scores are vendor models of Google's behaviour, which is a useful thing to have and a different thing from a measurement.

Worked example

Treat the score as a filter, not a verdict. A practical reading for a site without a large existing link profile:

KD 0 to 20    Attempt now. Winnable with a genuinely better page.
KD 21 to 40   Attempt when the surrounding cluster already ranks.
KD 41 to 60   Needs authority on the topic first, not a single page.
KD 61+        Not a near-term target. Useful as a long-term pillar.

Those bands are a working heuristic from our own practice, not a published standard, and they move with the strength of the site attempting them. A site that already ranks across a topic can take terms a new site cannot.

The check that matters more than the number: open the first page of results and read it. If the ranking pages answer the question properly and come from sites in your field, the term is hard regardless of its score. If three of them are off-topic or clearly stale, it is easier than it looks.

Common mistakes

• Treating it as a Google metric.
  It is not one. Google documents its ranking systems publicly and keyword difficulty is not among them.
• Comparing scores across tools.
  A 30 in one tool is not a 30 in another. The scales are independent models, so pick one and stay in it.
• Sorting by difficulty alone.
  The cheapest term to rank for is often the one with the least commercial value. Volume, intent and difficulty are three filters, not one.
• Ignoring your own starting position.
  The same term is not equally difficult for every site. A score cannot know what your domain already ranks for.
• Never re-checking.
  Difficulty moves as the results move. A term dismissed a year ago may be open now.

How to verify it yourself

Search Console's Performance report shows the queries you already receive impressions for, with your average position. Terms where you sit between positions eleven and twenty are usually the cheapest wins available, because the site has already been judged relevant and needs a better page rather than a new one. That report is measured rather than modelled, which makes it a stronger starting point than any difficulty score.

Related terms

• Domain authority
• SEO agency
• SEO services