It is not enough to say that there are millions of potential clients online. Those people are potential clients even without the Internet. Perhaps you can use the Internet to better complete some tasks, such as distributing information or providing customer service. Keep in mind that the Internet may not be available to all of your clients. People on the Internet are not typical of your local community, or even the country at large.
Internet users tend to be middle-income, white males who know how to use their computers.
Social rules are also different online, meaning that actions acceptable in the real world may not be appropriate for online. One famous example of this is bulk e-mailing. So even if you have the right clients online, your business model may not be successful with those clients. Once you determine the benefits, you must justify the costs. For example, putting a business home page on the World Wide Web should be compared with company brochures and other, traditional advertising techniques.