What aspect of SEO does the term "keyword density" refer to?

Keyword density refers to the frequency of a specific keyword or phrase appearing on a webpage in relation to the total word count of that page. This metric is calculated by taking the number of times a keyword is mentioned and dividing it by the overall word count, often expressed as a percentage.

A balanced keyword density is essential for effective search engine optimization (SEO) because it can help search engines determine the relevance of a webpage to a user’s search query. Overusing a keyword can lead to keyword stuffing, which can negatively impact SEO rankings and user experience. Conversely, underuse may not sufficiently signal to search engines what the content is about. Therefore, keeping an optimal keyword density helps enhance the visibility and ranking of a webpage in search engine results.

This concept is vital for anyone involved in site development and content creation, as understanding how to optimize keyword usage can significantly improve a website's performance.