A keyword difficulty score estimates how hard it would be to rank on page one for a given term, usually on a 0-100 scale, based primarily on the backlink profiles of the pages currently ranking. It is a useful filter, not a precise prediction.
What the Score Actually Measures
Most keyword difficulty tools calculate the score primarily from the number and quality of backlinks pointing to the top-ranking pages, sometimes weighted by domain authority. It does not account for content quality gaps, search intent mismatch, or how much better a new page could realistically be than what currently ranks.
Why Different Tools Disagree
Ahrefs, Semrush, and other tools each use their own backlink index and their own weighting formula, so the same keyword can show meaningfully different difficulty scores across tools. Use one tool consistently for comparison rather than treating any single number as an absolute truth.
How to Use It Without Over-Relying on It
- Combine it with search volume and intent – a low-difficulty, low-volume keyword may not be worth the content investment.
- Check who actually ranks, not just the score. A high score driven by one or two unusually strong outlier pages may still leave room if the rest of page one is weak.
- Weigh it against your own domain’s current authority, not the score in isolation – a KD 40 term is very different for a new site versus an established one.
Frequently asked questions
What is a good keyword difficulty score for a new website?
Generally under 20-30 for a genuinely new domain with little authority, rising as the site builds backlinks and topical authority over time.
Can I rank for a high-difficulty keyword with a new site?
It is possible but unlikely in the short term. Building topical authority with easier keywords first, then targeting harder ones as domain strength grows, is the more reliable path.
Is search volume or keyword difficulty more important?
Neither alone – the best targets balance real search volume, achievable difficulty given your current authority, and genuine relevance to what you offer.
Serpwize weighs keyword difficulty against real volume and business fit before recommending any target. See our SEO outsourcing service.
