Keyword Difficulty
01 Definition
Keyword Difficulty meaning: An estimate of how hard it would be to rank on page one for a given keyword.
Keyword difficulty is a score, usually from 0 to 100, that SEO tools assign to predict ranking competition for a term. Each tool, such as Ahrefs, Semrush, or Moz, calculates it differently, often from the strength of pages already ranking. It is an estimate, not an official Google metric or ranking factor.
Also called
Why it matters
How Keyword Difficulty fits the work
Difficulty scores help you prioritize keywords, so you can balance ambitious targets against easier wins that match your site's current authority.
In context
A new blog skipped a keyword with a difficulty score of 78 and instead targeted a related term scoring 24, where it had a realistic chance to rank.
Practical note
Because each vendor uses its own formula, scores are not comparable across tools. Treat difficulty as one input alongside intent, relevance, and your own backlink strength.