Content is King
Gone is the era when search engines only looked at the title, description and keyword tags in your pages to determine what search terms apply to your site. These days, nothing influences Search Engines the way content does. Truly Content is King
The very same reason real people would want to visit and stay on your site applies to Search Engines too. The SEO process only highlights the quality of the content you actually have.
No matter how good the products and services you offer on your site, or how beautiful your site looks, and how many wonderful features your site has, search engines today want to see the content present on your site.
If your site has great content, but is missing a description or keywords, you still have a much better chance of appearing higher on search engines than if you have all the right html tags but no content.