As a single website cannot be all things to all men (or search engines), a solution for generating more web traffic is to create a new website for each of a company's product or service offering.
We refer to to this as a 'Global Intranet' A Global Intranet is a collection of websites, all client branded, that use separate keywords to attract traffic and hence sales. Traffic is funnelled into the client's key website.
Often, it is attractive to have seamless browsing, with users going from one website to another, without realising a change in url. Other times it is suitable to create portals or information websites on a subject industry specific.
The concept of Global Intranets is seldom used by SEO consultants as it requires a number of technologies to be in place.