Content is king in search engine optimization. The search engines love text; high volume, high-quality content related to your business will serve you in a couple of important ways.
First, a site loaded with high-quality content of interest to site users will give them a reason to stay and a reason to come back. After all, the reason they came to your site was to find information. Second, you will receive the added benefit of serving up exactly what the search engines want – content. Search engines will have more information to store about your business and products; that information will translate directly into the ranking they give your site for related keyword phrases.