Content marketing impacts SEO and website traffic in multiple ways. For any website to be competitive in search engine ranking is MUST have a significant number of pages. These pages need to contain actual unique content with keywords and mentions of (a normal amount) topics surrounding the topics you want to be ranked for. The other reasons for content marketing are of course to bring information starved visitors to your site. As a curator and creator of valuable content, you are elevated in the visitor’s eyes to an authority and thought leader.