On-page SEO continues to evolve, but three foundational ranking signals still matter for how Google interprets the relevance and quality of your content:
-
Keyword Density
-
Keyword Prominence
-
Keyword Proximity
Understanding these signals — and how they tie into modern ranking factors like E-E-A-T, YMYL, AEO, and link building — can dramatically improve your organic visibility. Many of the concepts below also connect closely with principles discussed in guides like What Is SEO? and EEAT Checklist Guide for SEO Success.
Let’s break down each concept and show how to optimize them effectively.
What Is Keyword Density?
Keyword density refers to how frequently a keyword appears compared to the total word count.
Keyword Density (%) = (Keyword Appearances ÷ Total Words) × 100
Although keyword density is less important than it was 10 years ago, Google still uses frequency patterns as part of understanding topical relevance. Under-optimized pages can appear vague; over-optimized ones risk looking spammy.
✔ Recommended Density (2025)
-
Primary keyword: 0.8–1.5%
-
Secondary/NLP keywords: 0.3–0.8%
✔ Best Practices
-
Write for humans first
-
Avoid keyword stuffing
-
Use variations and semantic terms
-
Increase density gradually across sections
