What is MailChimp?
"MailChimp helps you design email newsletters, share them on social networks, integrate with services you already use, and track your results. It's like your own personal publishing platform". To get a more in depth description you can go to the What is MailChimp? section on their site.
It's easy to set up a MailChimp account once you've reviewed their offerings. MailChimp offers a variety of plans and prices, including a free starter plan.