What is keyword and key term density?

Keyword density is the percentage of times a keyword or keyword phrase is found in your page content amidst all the other content. For example, if you have a Web page with exactly 100 words on it, including all headlines, captions, alt text, and advertising, and you have a keyword phrase that is on the page 3 times, your keyword density is 3%:

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.

keyword density is the percentage of keywords found in the web page. The conservative percentage would be between 2% - 4%.  I reccomend you to use keywords in the title, meta tags, description and also in the text where ever it is necessary.

Keyword is used to reach our target audience and the recommended density is 2 to 3% per content.

I like this way of thinking is very high.

Keyword is the word which users types on search engine to search something while keyword density is an On-Page SEO element. Usage of keywords in the content of webpage as compared to the number of words used in the content. It should be between 2-3%.

Try see this article about keyword density and keyword prominence:  https://www.microsystools.com/products/keyword-research/help/website-seo-page-content/