Natural search engine optimization (SEO), also known as organic search engine optimization, is a specialized process that involves analyzing your website's underlying code, architecture and visible content and making enhancements so that the site is returned more prominently in the natural search results of spider-based search engines (such as Google and MSN).
Search engine marketing (SEM) can deliver huge numbers of qualified prospects to your website. But that's just the first step. Search Engine Marketing (SEM) is the practice of getting your website visible on the major search engines such as Google and Yahoo. The two most successful techniques for enhancing your online image are: website search engine optimization, and inbound links.
Usually it is fine to just submit to Google, however with a powerful online tool like Veretekk you can submit to multiple search engines with one click.