Keyword frequency in SEO (Search Engine Optimization) refers to the number of times a particular keyword or phrase appears on a webpage or within a piece of content relative to the total number of words on that page or content.
In other words, keyword frequency is the ratio of the number of times a target keyword appears on a page or content compared to the total number of words on that page or content. It is important to note that excessive use of keywords (known as keyword stuffing) can lead to a penalty by search engines, so it is recommended to use keywords naturally and in moderation.
Keyword frequency is one of many factors that search engines consider when ranking pages in search results, but it is not the only factor. Other important SEO factors include the relevance of the content, the quality of the website, the use of internal and external links, and user engagement metrics such as time on site and bounce rate.