Monolithic Architecture
Monolithic architecture is a straightforward and unified approach to software design, where all components of an application are built and deployed as a single unit. This simplicity makes it easy to develop, test, and deploy, often resulting in strong performance due to reduced communication overhead between components.
It is particularly well-suited for small to medium-sized applications, proof-of-concept projects, and scenarios that require rapid and agile development. Because everything is contained within a single codebase, teams can move quickly without the complexity of managing distributed systems.
For a more detailed introduction and visual explanation, refer to this article.