# Introduction

- [Sharing code](/polylith/introduction/sharing-code.md)
- [Testing incrementally](/polylith/introduction/testing-incrementally.md)
- [Polylith in a Nutshell](/polylith/introduction/polylith-in-a-nutshell.md): Polylith is a software architecture that simplifies our backend services and tools by enabling us to construct them as “modular monoliths” using composable building blocks.