Keyword Density
Keyword density is the percentage of times a target keyword or phrase appears on a page relative to the total word count. It was once a primary optimization metric but is now largely outdated.
In the early days of SEO, stuffing a page with a keyword at 3-5% density could boost rankings. Modern search engines use natural language processing (NLP) and understand semantic meaning, making exact keyword density irrelevant — and over-optimization actively harmful.
Google's algorithms detect keyword stuffing and may demote pages that repeat keywords unnaturally. Instead of targeting a specific density, write naturally and cover the topic comprehensively. Use related terms, synonyms, and semantic variations that a human expert would naturally include.
If you find yourself counting keyword occurrences, you are optimizing wrong. Focus on search intent, content depth, and user experience. Include your target keyword in the title, H1, and first paragraph — then forget about it and write for humans.
Related terms
On-Page SEO
On-page SEO refers to the optimization of individual web page elements — content, HTML tags, structured data, and internal links — to improve search engine rankings and user experience.
Search Intent
Search intent (user intent) is the underlying goal a user has when typing a query into a search engine. Google classifies intent into four types: informational, navigational, commercial investigation, and transactional.
Long-Tail Keywords
Long-tail keywords are specific, multi-word search queries that individually have lower search volume but collectively account for the majority of all searches, and typically convert at higher rates.
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