Microservices architecture facilitates scalable and independent service deployment, enhancing development agility and system resilience by allowing developers to create smaller, standalone software services that can be updated more frequently. These services, which are lightweight, stateless, and modular, enable teams to update individual components on their own schedule, improving responsiveness to user needs. The tutorial demonstrates deploying a Node.js microservice on Kubernetes using Harness, a modern software delivery platform, which simplifies the deployment process by leveraging Docker and Kubernetes for scalability and continuous integration. Microservices are ideal for large, complex applications that require scalability and are often used alongside containers and service-oriented architecture, but their benefits can vary depending on the application's size and implementation strategy.