Keyword density refers to the percentage of times a specific keyword or phrase appears on a webpage in relation to the total number of words on that page. In other words, it is a measure of how often a particular word or phrase is used in the content of a web page. Keyword density used to be an important factor in search engine optimization (SEO) because search engines used to consider it as a factor to determine the relevance of a webpage for a particular keyword. However, nowadays, search engines have become more sophisticated and take into account many other factors besides keyword density to determine the relevance and quality of a webpage. Therefore, it's no longer considered a primary factor for SEO, and overusing keywords in content can actually harm the webpage's ranking.
While it was once a significant factor in determining a webpage's relevance and ranking for a particular keyword, search engines now use a variety of other signals to evaluate the quality and relevance of a webpage. In fact, overusing keywords and focusing too much on keyword density can now be seen as a "black hat" tactic and can result in a penalty to the webpage's ranking. Therefore, it's important to focus on creating high-quality, relevant content that naturally includes keywords and phrases, rather than trying to artificially increase keyword density.
