From search engine optimization (SEO) perspective, the importance of keywords can be assessed in two different areas. First, the apt placement of keywords on the web pages when writing content (both for on page and off page), and second is the density of keywords on each web page.

Keyword density is the percentage of occurrence of keywords or phrases on a webpage to the total number of words. It can be used as a factor to find if a web page is relevant to a specified keyword or keyword phrase. The number of keywords used on a webpage makes a difference to all of the search engine algorithms.

Keyword density is one of the chief factors to be considered prior to the execution of search engine optimization (SEO). With right keyword density on your web pages one can easily and quickly increase the visibility of his website in the search engine results pages. Search engines categorize the theme of a website based on the keyword density. Web pages with right keyword density can easily attain higher search engine positions.

On the other hand, higher keyword density or irrational placement of keywords leads to stuffing. This may result in the branding as spam by the search engines. So it is most important to maintain optimum balance of keyword density on web pages to make SEO (search engine optimization) efforts effective. It is advisable to keep your keyword density between 3% and 5%. This should be applicable to all pages of your website.

Blogging and writing and posting articles are the two important SEO (search engine optimization) strategies often followed by webmasters. These strategies help in good brand recognition and also push up your site ranking. Maintaining proper keyword density in the blogs and the articles you post is important to optimize your site for that specific keyword.