The uppermost layer in a software architecture or network model, responsible for user-facing functions and services.
The application layer is the part of a computing system or network that directly interacts with end-users and applications. It provides services and functionalities that users can access, such as graphical user interfaces, data processing, and communication protocols for specific tasks. In the context of AI, it refers to the software that utilizes AI models to deliver user-facing features or automate specific business workflows, distinguishing it from the underlying AI model itself.