What is email automation and what is it good for?
The short answer
Email automation sends messages by itself based on behavior: a welcome series after signup, a reminder after an abandoned cart, a birthday email. Set it up once and it works around the clock. It is the highest-ROI part of email marketing.
In detail
A regular newsletter is something you send manually to everyone at once. Automation flips it. The recipient triggers the email. Someone signs up and automatically receives a three-part welcome series. Someone abandons a cart and gets a nudge a day later. Someone clicks on a topic and receives more about it next week. Every email lands at exactly the relevant moment, without you lifting a finger.
The numbers back it up. Automated emails get dramatically better open and click rates than blasts, simply because the timing is right. The welcome series is the mother of all flows. Someone who just signed up is at peak curiosity, which makes it the moment for your best material.
Tool-wise, MailerLite and Brevo cover the basics well (free at MailerLite). ActiveCampaign is the king of complex flows with a CRM attached, and online stores look at Klaviyo or Omnisend with their prebuilt e-commerce flows. Start simple. A two-email welcome series takes one evening to build.