The main advantage of using a microservices architecture lies in its modularity, allowing developers to build applications as a collection of independent services. Each service operates in its own environment and can be developed, deployed, and scaled independently. This enhances flexibility and accelerates development cycles, as teams can implement updates or new features without disrupting the entire system. Microservices also improve resilience, as failures in one service do not necessarily impact others. Overall, this architecture supports continuous integration and delivery, promoting efficiency and innovation.