Definition
Keyword density measures the percentage of occurrences of a specific keyword in a text relative to the total word count. Historically used as an important SEO factor, keyword density has lost significance as Google's algorithms evolved toward semantic understanding of content. There is no ideal density. Excessive repetition (keyword stuffing) is penalized by Google. The modern approach is to write naturally using synonyms, semantically related terms, and by addressing the search intent.
Key Points
- A historical concept that has lost importance with modern algorithms
- No ideal density: writing naturally is the best approach
- Keyword stuffing (excessive repetition) is penalized by Google
Practical Examples
Excessive density
A 500-word text repeating 'running shoes' 25 times (5% density) is considered keyword stuffing and risks a Google penalty.
Natural approach
An article about running shoes naturally uses 'running shoes,' 'sneakers,' 'running footwear,' and 'athletic shoes' for semantic coverage without over-optimization.
Frequently Asked Questions
There is no magic number. Google uses semantic understanding rather than keyword counting. Write naturally for the user. If the text seems forced or repetitive, it is too much.
Yes, absolutely. Google detects keyword stuffing and can penalize the page or site. Modern algorithms understand synonyms and variations, so repeating the same term is unnecessary.
Go Further with LemmiLink
Discover how LemmiLink can help you put these SEO concepts into practice.
Last updated: 2026-02-07