Software architecture describes the major parts of an application and how they exchange information. It includes responsibility boundaries, dependencies, data storage, and decisions about where important behavior belongs.
Understanding architecture helps developers and agents identify the right place for a change without reading every implementation detail. That broad understanding must still be checked against the actual code, especially where historical exceptions or tightly connected components affect behavior.
ELI5
Software architecture is the overall arrangement of a program. It shows which part handles each job and how those parts communicate.
For example, an app might separate its screens, business rules, and stored records. Understanding those boundaries helps a developer change a screen without accidentally changing how records are saved.
