Creating a newsletter in Mailchimp involves 9 steps that help you create an effective email campaign. You start by clicking on the "Create" button, selecting the type of email you want to send and giving it an internal name. Next, you select your recipients or import contacts, enter the sender's information, write a compelling subject line, and choose a template for your email body. You then add content using drag-and-drop blocks, preview your email, test it with a test email, and finally, send it to your subscribers. To optimize your newsletter for maximum impact, you can use tips such as double-checking everything, keeping it clean and scannable, including visually dynamic elements, adding products, A/B testing subject lines, embracing the power of AI, and using merge tags. Additionally, you can automate your Mailchimp newsletter with Zapier to integrate it with other apps and services.