Newsletters are one of the most powerful digital marketing tools at your disposal since they let you communicate directly with your customers in a personalized way when they subscribed.
Steps:
- In the theme editor (Customize), click Add section 
- Search Newsletter 
- Click Save 
After the customer fills in the email in the newsletter form, the customer's email will be saved in Shopify admin > Customers or in the email marketing app that you use. This belongs to the setting in Theme settings > General. You can refer to this guide for details Link

1. Newsletter item content
The Newsletter section has total of 7 content blocks, you can use those blocks to build the Newsletter layout that you wanna use, you can view the video below to know about the Newsletter section blocks:
2. How to configure the Newsletter section?
- Heading options: You can freely add the section heading and customize it with many design options. 

- General options: You can choose a layout, design and set the content align, Enable border of newsletter box for the section. 
- Design options: Please follow this guideline to config Layout, Background, Margin/Padding for the section. 
 
         
                         
                                     
     
    