As applications grow more modular, it becomes essential to verify how different components interact with each other. Validating these interactions helps ensure that individual modules don’t just work in isolation but behave correctly when combined.

By exploring integration testing, teams can understand how to test communication between services, APIs, databases, and internal modules. This helps reveal issues such as incompatible data formats, broken dependencies, or unexpected behavior when components integrate.

Integration testing strengthens reliability by catching problems early in the development lifecycle, ensuring smoother workflows and reducing failures that might only appear when multiple parts of the system work together.