What is keyword density?
The keyword density of a piece of content refers to how often the target keyword appears compared to the total number of words. For most purposes, it should be between 1% and 2%.
Where does keyword density fit into your workflow?
Keyword density is only useful after you’ve done your keyword research and before you publish the page. It’s an optimization step that comes during content creation and editing, and you should always check it before publishing.
You can’t just randomly choose keywords for a page; they have to be part of your broader strategy. If you don’t know what people are searching for, you’ll never get them to read your page. And if you do know what they’re searching for, but you haven’t analyzed competitors’ pages or considered audience intent, you won’t know whether your page will satisfy those searches.
In other words, keyword density is not something you do on its own. It works best when you integrate it with other SEO steps.
How to use keyword density
Once you’ve identified your primary and secondary keywords from your keyword research, start writing. Write about the topic your audience wants, using the keywords naturally.
Then, calculate your keyword density by dividing the number of times the keyword appears by the total number of words in your article and multiplying by 100. If your density is over 2%, revise sentences to keep the language natural.
The primary keyword should appear in the title, in the first 100 words, and at least once every three paragraphs. But remember, you shouldn’t force it into sentences—it should flow naturally. Use synonyms and related terms where possible.
Finally, double-check your keyword density before publishing.
Let’s say you’re writing a 1,000-word article about “keyword density in SEO.” To hit a 1.5% density, you’d want the phrase to show up about 15 times. You might use it in the introduction, as a section header, and then sprinkle it throughout the rest of the text. The result would feel natural to readers and search engines alike.
But if you were to use the same phrase 30 times in that same 1,000-word article, the keyword density would be 3%. The repetition would make the article hard to read and likely to be penalized by search engines.
Mistakes to avoid
If you focus too much on hitting a specific percentage without considering user intent, you risk creating a poor user experience that could hurt rankings. If you ignore the intent behind the keyword and focus only on repeating the keyword itself, your content may feel robotic or thin.
Also, you must consider secondary keywords and related terms. If you focus only on one keyword, you limit the page’s topical authority. Researching competitors’ content can help you see which other words they include, giving you ideas for related topics.
Remember, you should write for humans, not search engines. Don’t let keyword density become an obsession.
Still, some writers ask me if they need to count variations of their keyword or related terms. They also ask how search engines treat latent semantic indexing (LSI) keywords.
The answer is yes, you should use related terms, but no, you don’t need to track each of them separately. Search engines value semantic richness and contextual relevance more than ever before, so including variations and related terms can improve your ranking potential without over-optimizing.
Checklist
Research and select primary and secondary keywords.
Write with the user in mind.
Calculate keyword density.
Edit to maintain a density of 1–2%.
Distribute the keyword in the title, headers, and body.
Make sure the keyword feels natural.
Review the content.
Publish.
Monitor performance.
Adjust for changes in algorithms.