These systems are usually set-up as part of a your web server or email marketing service such as Mailchimp, and are used to build relationships and stay connected to your customers. When used in conjunction with an opt-in or sign-up box on your landing page, website or blog, they are invaluable. This is what lead building is all about. And without leads there can be no business.
If you want to grow your contact list and your business while freeing up more of your time, autoresponders are the way to go!
For more information on how autoresponders can benefit your business, visit: Work At Home Start-Up Guide