Simply put, any interaction of a visitor with your website is stored in your database. From simple newsletter signup forms, to contact forms, and online store purchases, visitors information is stored securely in your database and available to make you a better and more powerful merchant. Customer form interactions trigger workflows that can do everything from notify you by e-mail or text, to trigger a series of tasks for your staff. The built in CRM system helps to make sure you capitalize on opportunities, and that you don't drop the ball on potential business.
Provide better service for your customers, capitalize on opportunity, gain insight into the needs of the visitors to your site. These are the things an online business / website are supposed to do for you and your business.