Content Optimization is one of the most important factors to get higher ranking on search engines. The phrase "content is king" is very popular among search engine specialists. A good quality, well written content works wonders for a website.
Why is content so important for search engines? When we say search engine, the first thing that comes to our mind is a place where you can find information. The primary purpose of every search engine is to give as much information as they can to its users. If your site is not informative, chances are that you might not rank well on search engines (big brand name companies are exception here).
Writers need to be skilled enough to write quality material keeping in mind the guidelines of search engines.. To write content for any website, you need to understand the primary business of the company. After analyzing the business, content writers go through the Keyword Analysis Report to check for suitable keywords. Using keywords within the content in appropriate density is the biggest challenge for any content writer. Using necessary HTML tags within your content (wherever required) is very important for search engine spiders. Many content writers ignore this aspect when writing content for search engine. The language of the content is also very important. You are promoting your product within your content, so it is important to have a language that markets your product but at the same time is simple enough for users to understand.
This was about writing fresh content for your website. If you already have content on your website, modify the existing content as per search engine parameters. While modifying existing content, you must check the keyword density and also the language of the content. At times writing a new and fresh copy of content takes lesser time than modifying an existing one.
http://www.buzzle.com/articles/impact-of-content-optimization-in-seo.html