A domainn is the name by which it is known him a website, a direction easy to remember that your users will use to find and to accede to your website. Nowadays to have a domainn is essential for a company. Therefore, you will need to register the own domainn of his company so that when somebody writes www.suempresa.cl the user can accede to all the information that you have published in him.
When having a domainn can also have associate the customized accounts of mail that its company needs, example:
info @ suempresa.cl, contact @ suempresa.cl, or any other that create necessary to use. A domainn is used for identifiar to its company or a website in Internet.