Yoast SEO Keyword Density
Shows the percentage of times your focus keyphrase appears in a page's copy relative to total word count, as reported by Yoast's content analysis.
If you have used Yoast's density score as a direct ranking factor, you have mistaken a writing-quality signal for the search engine's own evaluation.
Key points
- Use synonyms and related terms when the keyphrase density is high to avoid sounding unnatural.
- Ensure the full focus keyphrase appears within one sentence to be counted correctly by Yoast.
- Treat density as a heuristic for content editing, not a formula to hit a specific percentage.
- Check spelling of the keyphrase, as misspellings prevent Yoast from recognising it.
A 1,200-word article and the density warning
A 1,200-word article on running shoes uses the keyphrase 'best running shoes' 15 times, giving a keyphrase density of about 1.25%. Yoast's content analysis marks this as a positive result. Another writer tries to improve the density by repeating the exact phrase 30 times, hitting 2.5%, and Yoast warns of high density. After replacing ten occurrences with synonyms like 'top running shoes', the density drops to 1.67% and the warning clears.
Three ways it goes wrong
- Confusing density with ranking factor Yoast's density check is a writing-quality signal, not a Google ranking factor. Treating it as a direct algorithm input leads to over-optimisation and awkward text.
- Forcing exact repetition Repeating the exact keyphrase to meet a density target often creates keyword stuffing, which hurts readability and can trigger penalties.
- Ignoring spelling errors If you spell the keyphrase differently across the page, Yoast may not count it correctly, giving a false low density reading.
Three factors that change your density result
- Word count of the page Adding or removing copy changes the ratio. A short page with five keyword mentions may show a high density, while a long page with the same mentions shows low density.
- Use of synonyms Replacing exact keyphrase occurrences with synonyms lowers the density count but improves natural language and semantic SEO.
- Keyphrase length Longer keyphrases of three or more words are harder to repeat naturally, so their density tends to be lower than shorter phrases.
Common questions
Should keyword density be within a specific range?
Rough heuristics suggest 0.5% to 3% for Yoast's analysis, but there is no fixed rule.
How do I add multiple keywords in Yoast SEO?
Yoast focuses on one focus keyphrase per post. For multiple keywords, use related keyphrases or synonyms to satisfy the content analysis.
Yoast SEO free vs premium: which one checks keyword density?
Both the free and premium versions include the keyword density check in the content analysis.
Sources
- Yoast — What is keyphrase density and why is it important? Official Yoast explanation of keyphrase density and its role in content analysis.
- Yoast SEO documentation / help content General Yoast SEO help and documentation covering the plugin's features.