The MACH Alliance is a non-profit organization promoting composable architecture principles, specifically Microservices, API-First, Cloud-Native SaaS, and Headless, which are gaining popularity in the Retail industry. MongoDB has been a member of the alliance since 2020, acting as an "enabler" to help retailers adopt MACH principles for their applications. The benefits of MACH include increasing innovation speed while reducing operational costs and risk. A MACH architecture is ideal for retail businesses looking to deliver new experiences quickly, with Microservices allowing for independent development, API-First promoting data sharing, Cloud-Native SaaS reducing operational overhead, and Headless decoupling front-end from back-end. MongoDB's document model and flexibility make it an ideal data layer for MACH compliance, enabling speed of development, change, and scalability for retailers adopting this architecture.