Application Architecture refers to the structural design of software applications, outlining how different components interact and work together. It encompasses various elements, including user interfaces, databases, and server-side logic, ensuring that the application functions efficiently and meets user needs. A well-defined Application Architecture helps developers create scalable and maintainable software. It can follow different patterns, such as Microservices or Monolithic Architecture, each offering unique advantages depending on the project's requirements. By establishing clear guidelines, it facilitates collaboration among team members and improves overall project quality.