A welcome email is an email sent, usually automatically, to new leads when they register on a site or to new customers with the first order. It is meant to familiarize them with the brand and engage them further to follow the company on social media, or check out the blog, or just keep opening the emails.
A welcome email can explain how a service works, what the terms are and what to expect from this email subscription. You can also ask about the subscriber’s interests and preferences in order to tailor the communication from now on.
on Metrilo blog