The online newsletter, translated as letter, it’s an e-mail sent to a list of customers. The companies use the newsletter in order to send information to a target public. There is an offline newsletter too. These are, in general, brochures or little magazines.
In a newsletter you can find out news about the company or events. Furthermore, a newsletter has, in general, contacts too. Like that, the clients will see the last news about your company, and the potential clients will see the new products.
The newsletter is also useful in order to arrive to the potential clients. Every new product delivered through e-mail needs an interesting presentation, so that the client wants to find more details by visiting your site.