If you already have good collateral materials these can usually be moved to the web fairly easily. If not, these have to be developed in much the same way that promotional materials are created for print. The Web can also be useful for customer support. Since on the web you can place an almost unlimited about of text information online at little additional cost, it makes it easy to have lists of questions and answers, product update information, press release, etc. Since information on the web can be updated quickly you can have always the latest information online.
Email is often faster and cheaper than staffing phone lines.
How to go about building an Internet presence. Usually this will involve creating a website and getting one or more email addresses. Some companies chose to build and maintain their website inhouse, others hire people to do this for them. What is appropriate will depend on your skills, interest, the nature of your business and your specific objectives for marketing on the Internet. A good place to start is to look at other sites and identify ones you like.