Mailchimp is an online service used to design and send emails in the form of newsletters, personalised emails or campaigns. It also provides, for example, the ability to share on social networks and track success rates.
It is a comprehensive marketing tool that allows to promote services, products and other things that the user is engaged in. It’s not just about sending out emails, but Mailchimp is a much more complex solution, allowing you to create and maintain lists of your subscribers.