A company or individual had built a website that generated traffic through the search engines as they grew in customers/visitors people would bookmark the site or just remember the address and type-in when they wanted to go back to the website.
Have other relevant sites link to yours.
Submit it to Google at
Add your URL to Google.
Submit a Sitemap as part of our Google Webmaster Tools. Google uses your Sitemap to learn about the structure of your site and to increase our coverage of your webpages.
Make sure all the sites that should know about your pages are aware your site is online.
Submit your site to relevant directories such as the Open Directory Project and Yahoo!, as well as to other industry-specific expert sites.
Make pages primarily for users, not for search engines. Don't deceive your users or present different content to search engines than you display to users, which is commonly referred to as "cloaking."
Avoid tricks intended to improve search engine rankings. A good rule of thumb is whether you'd feel comfortable explaining what you've done to a website that competes with you.