Keyword density refers to the percentage of times a particular keyword or phrase appears on a web page in relation to the total number of words on the page. In the past, search engines used keyword density as a factor to determine the relevance of a web page for a particular search term. However, nowadays, search engines have become much more sophisticated and consider many other factors as well.
Keyword density can affect on-page SEO in a few ways. If a page has too little keyword density, search engines may not consider it relevant enough for the target keyword, and it may not rank as highly as other pages with higher keyword density. However, if a page has too high of a keyword density, it may be flagged as spammy or manipulative and may be penalized by search engines.
Therefore, it’s important to find a balance in keyword usage on a page, where the keyword is used in a natural and relevant way, and not overused or stuffed unnecessarily. The focus should always be on creating high-quality, valuable content for users, rather than solely optimizing for search engines.