Shopify Plus is an enterprise version of the Shopify eCommerce platform. It offers businesses an expanded range of features to help them open, grow, and operate their businesses more efficiently. Most importantly, Shopify Plus is designed to make it easier for developers to create personalized experiences for their customers in a headless setup.

Headless setup is the process of separating the front-end (the interface that customers interact with) from the back-end (the back office and server-side infrastructure) of an eCommerce site. It allows businesses to create personalized customer experiences across multiple devices (desktop, mobile, tablet, etc.) while ensuring the backend runs smoothly.

Shopify Plus offers a wide range of features designed to make it easier for developers to personalize customer experiences in a headless setup. These features include:

1. Multi-currency support: This allows customers to purchase products in their preferred currency, improving their shopping experience.
2. Custom domain support: Shopify Plus allows developers to customize their website’s domain name, giving customers a more personalized experience.
3. Automated checkout: This feature allows customers to purchase products without having to fill out long forms, increasing conversion rates.
4. Developer-friendly APIs: Shopify Plus gives developers access to advanced APIs, making it easy to integrate other apps into your store. This helps customers have a smoother shopping experience.
5. Faster page loads: Shopify Plus offers a range of tools to help developers optimize page load times and ensure customers have a smooth, uninterrupted shopping experience.
6. Customizable Themes: Shopify Plus offers a variety of customizable themes, giving developers the flexibility to create unique customer experiences using existing themes.

All of these features make it easier for developers to create personalized experiences for their customers in a headless configuration and help companies take advantage of the flexibility and scalability of this architectural approach. In short, Shopify Plus is the perfect platform for businesses looking to launch, grow, and optimize their stores in a headless setup. Its extensive feature set makes it easy for developers to create personalized experiences for their customers, helping businesses maximize their growth potential.