Have you ever met a really well dressed person with no personality to back it up? That’s a good example of how it feels to find a well-designed website without quality content to keep you interested. You can’t gain long term customers with just a pretty face. Your content is the best way to build a long term relationship with your customers, but that’s not the only reason “content is king”.
Search Engines look at the content of a website more than anything else. A search engine can distinguish the quality of the content and use that rating as the most important value when placing your site. Google, Yahoo, Bing, and other search engine’s main job is to find the best and most useful content for a given search term. If you want to rank high in the search engines, you have to provide the most useful content for your customers.