Internet marketing covers a wide range of advertising options intended to drive traffic to a site. SEO typically focuses on developing the site itself so that it ranks well in free search engine listings. SEO is a subset of Internet marketing, but they are not one and the same.
well said TE. SEO is really yesterdays news. A site now needs to be treated as a whole rather than online offline , seo sem etc. ALL your marketing should roll together, and your seo should be part of the SEM and direction of the companies marketing programme in general.