Keyword density produces a percentage, which can make it look more authoritative than it really is. The number is useful for finding repetition, but it cannot determine whether a page is accurate, complete or helpful.
What density measures
At its simplest, density compares occurrences of a word or phrase with the total number of words. It answers a narrow question: how frequently does this term appear? It does not judge the quality of the surrounding writing.
Use it as a diagnostic
Use density to identify suspicious repetition and then read the affected paragraphs. If the same phrase appears in every heading and sentence, the problem is probably editorial. The Word & Keyword Density Counter can help you find repeated one-word and two-word phrases.
Write for topic coverage
Useful articles naturally contain related terminology because they explain a subject thoroughly. A sitemap guide may need words such as URL, crawler, canonical, indexing and robots.txt. There is no reason to remove a necessary term simply to lower a percentage.
Watch for awkward repetition
Read the article aloud. Repetition that looks harmless on screen often becomes obvious when heard. Check headings, introductions, calls to action and template text first.
Do not chase a fixed target
There is no universal ideal keyword density published by search engines. A warning threshold can be a useful internal editorial rule, but it should never be presented as a search ranking requirement.
A better review
First ask whether the page answers the visitor's question. Then check structure, examples, evidence, readability and originality. Only after that should you use density as a secondary signal for repetition.
Conclusion
Keyword density is a measurement, not a writing strategy. Use it to find patterns worth reviewing, then make the final decision based on clarity, context and usefulness.