Find it really difficult to sell their products and services. The virtual world has gradually taken over a lot of functions and activities that we perform in our daily lives. So, advertising has also got to be new and interesting, in order to draw the attention of customers from all parts of the world. Certain advertising campaigns, blogging and articles about products, offer an idea to people about the type of products and services they sell. In a lot of sites, we do see a lot of references and links. When these links are clicked, and the customer accesses a company’s site, he finds varieties of products and services, which may interest him. He may purchase, and even refer it to his friends, which increase the popularity of the product and the accessibility of the site.