# Customer Communications Overview

Our platform provides a flexible system for customer communications, including emails, marketing messages, and printable documents (PDFs). These communications are generated dynamically to ensure personalized and relevant content for each recipient.

## Templating with Liquid

We use [Liquid](https://shopify.github.io/liquid/) as the primary templating language for rendering all customer-facing documents:
- **PDFs**: Generated using Liquid templates to create dynamic, data-driven documents.
- **Emails & Messages**: Both use Liquid to inject dynamic content, such as customer names, order details, and more.

## Email Templates: Liquid + MJML

Email templates use a combination of Liquid and [MJML](https://mjml.io/):
- **File extension**: `.mjml.liquid`
- **Rendering order**: Liquid is rendered first to inject dynamic data, then the resulting MJML is compiled to responsive HTML.
- **Benefits**: This approach allows for highly customizable, responsive emails that look great across all devices and email clients.

## Summary

- All customer communications are powered by Liquid templates for dynamic content.
- Emails use MJML for responsive design, with templates written as `.mjml.liquid` files.
- This system ensures your communications are both personalized and visually appealing.

For more details, see the documentation on [MJML basics](./mjml-basics) and [Liquid usage](../../feeds/liquid-api-for-emails).