In 2020, the number of worldwide email accounts reached 4 billion which makes emails the current currency of the web. When creating new social media accounts and placing online orders, email addresses are required- it is fair to assume that almost everyone online has an email address. This is why keeping up with customers via email is so important. Mailchimp is a tool that gives relevant metrics such as the number of  clients that opened or discarded the email as well as how many people clicked on the links in the message.