The density of keywords is an indicator of the number of times the selected keyword appears in the web page. But mind you, keywords should not be used, but should be just enough to appear at important places.
If you repeat the keywords in every other word on every line, your site will probably be rejected as an artificial site or spam site.
The density of keywords is always expressed as a percentage of all words of content on a web page.
Suppose you have 100 words on your web page (not including HMTL code used for writing the web page), and you use a keyword for five times in the content. The density of keywords on this page is obtained by simply dividing the total number of keywords, by the total number of words that appear on your web page. So here it is 5 divided by 100 = .05. Because keyword density is a percentage of total words on the page, above multiplied by 100, which is 0.05 x 100 = 5%
The accepted standard for a keyword density is between 3% and 5%, to get recognized by search engines, and you should not exceed.
Remember that this rule applies to each page of your site. It also applies to not only a keyword, but also a set of keywords that relates to another product or service. The density of keywords should always be between 3% and 5%.
Simple steps to check the density:
• Copy and paste the contents of the web page of an individual in a word processing program like Word or Word Perfect.
• Go to the Edit menu and click on “Select All”. Now go to the Tools menu and select “Word Count”. Note the total number of words in the page.
• Now, select “Search” function on the Edit menu. Go to the “Replace” in the tab and type the keyword you are looking for. ‘Replace’ that word with the same word, so you do not change the text.
• When you finish replacing the function, the system will provide a number of words you replaced. This gives the number of times you used the keyword in this page.
• Using all the words on the page and the total number of keywords you can now calculate the density of keywords.