Keyword difficulty (KD)
TL;DR
Keyword difficulty is a 0-100 score indicating how hard it is to rank for a specific keyword on Google's first page.
Keyword difficulty (often abbreviated KD or KW Difficulty) is a metric calculated by SEO tools that estimates a query's competitiveness. The score combines factors like the domain authority of existing top-10 ranking pages, backlink counts to those pages, and the depth and quality of that content.
Why it matters
Why it matters
Time is your scarce resource. Writing for a KD-90 keyword you'll never rank for is wasted effort. Smart content strategy targets KD <30 keywords first ("low-hanging fruit"), builds authority, then progressively tackles higher KD keywords.
How to use it
How to use it
- 01 Start with KD 0-30 keywords if you have a new site (DA <30).
- 02 Mid-tier sites (DA 30-50) can tackle KD 30-50.
- 03 KD 50+ requires strong domain authority, varied content and backlinks.
- 04 Combine KD with search volume — a KD-15 keyword with 50 searches/mo is rarely worth it.
- 05 Don't ignore KD for pure long-tail (4+ words) — those often rank despite high KD.
Example
"AI marketing" has KD 78 (top-10 full of giants like HubSpot). "AI marketing tools for SMB Netherlands" has KD 18 (more specific, less competition). For a new site, the second one is the smart pick.