What is email automation and what is it good for?
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.
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.