One of the biggest mistakes people make is underestimating the importance of content within a web site. Content refers to the verbiage that is needed for every page of the web site. When generating content, consider two things: Quantity and Quality. The quantity of content is important because much like what you are reading now, people look for information when browsing web sites. If you bombard them with products and services and offer too little information, the visitor may be turned off by an overly commercial approach. Even if you only sell products and that is the only goal you have, you may sell more if you educate your visitors about ways that can use them and other products that are complementary to them. People also may refer their friends to your site because you have taken the time to educate them about something. This places you in a more authoritative light about your product and trade.
Another motivation in offering more content within a web site is to rank higher within search engines. Engines such as Google are striving to refine their search algorithms to display more relevant content when someone does a search for a subject. Imagine that you did a search on Google for "history of baseball" and all you got were sites trying to sell you something or sites that had nothing to do with baseball at all. You would quickly look to another search engine to find better results. Consequently, it is becoming more difficult to rank higher in the engines unless you offer some type of informative content that goes beyond just selling something.
Finally, the quality of your content dictates how long your visitor will make use of your site. If the web site is riddled with spelling and grammatical errors or if does not read well, you may lose your visitor's attention. The average site visitor will stay at your site for five minutes. How much longer they stay is up to you. Therefore, we highly recommend that you involve a copywriter from the beginning. Any good design firm will offer such services. Since you understand your business best, it is usually very effective to write the first draft yourself and then have a copywriter proof it and add some creative flare to the verbiage.
Most importantly, content creation is a stage in web development that is often the cause of delay within a project. The site owners are usually very busy and cannot attend to content development, which consequently can delay a project indefinitely. Spend a little more on content creation - it will dramatically pay off in the future.