Microservices architecture is a service-oriented architecture that structures an application as a collection of small autonomous services designed around a business domain. This blog covers the fundamentals of microservices architecture and provides tips to keep in mind when working on microservices patterns and its challenges. It explores the benefits of using the microservices pattern such as fault isolation, agility, speed of iteration, and granular scaling, and discusses the caveats of operational load, difficult monitoring, testing scope, and eventual consistency. For a well-designed microservices architecture, it emphasizes the importance of functional cohesion and the common closure principle.