Keyword density is the measurement in percentage of the number of times a particular keyword or phrase appears compared to the total number of words in a page.
Keywords density means the percentage of keywords repeated in your page content. Generally it should be 3%. More keywords density also considered spam by search engine.
Keyword density is the percentage of times a keyword or phrase appears on a web page compared to the total number of words on the page. In the context of search engine optimization, keyword density can be used to determine whether a web page is relevant to a specified keyword or keyword phrase.
My experience keyword density is a very important factor. However, it's more important to ensure that your target keywords appear in key places, such as: Page title, H1, H2, Main body text, Internal and external pointing to your page, Image alt tags.etc
Keyword density tells you how often a search term appears in a text in relation to the total number of words it contains. For example: if a keyword appears three times in a 100 word text the keyword density would be 3%. From the point of view of search engines, a high keyword density is a good indicator of search engine spam. If a keyword appears too often in a website, search engines will downgrade the website and it will then appear lower down in search results.
Keyword density is the ratio (or percentage) of the number of times your keyword appears on the page of your article, versus the number of words on the page.