Using a microservices architecture for scalability is significant because it allows applications to be divided into smaller, independent services that can be deployed, scaled, and updated individually. Each microservice focuses on a specific business function and can interact through well-defined APIs. This architecture enhances the ability to scale specific components based on demand, improving overall performance and resource utilization. Additionally, it supports continuous delivery and integration, allowing teams to innovate rapidly without affecting the entire system. This flexibility not only increases the resilience of applications but also helps organizations respond swiftly to market changes.