You can put up the best Web site ever and offer the highest quality products or services, but if no one knows you are open for business, you will have no incoming traffic. With thousands of people starting online businesses every day across the world, Web site marketing has become a critical element of an online business plan. You need to know the ins and outs of Web site content, blogs, search engine optimization, e-publications, and social networking. You also have to learn about paid advertising opportunities. With the right marketing plan, you’ll target the people who are most interested in your product or service.