End to end testing is a software testing approach that validates an application by simulating real user workflows from start to finish. Instead of testing individual components in isolation, it ensures that all parts of the system, frontend, backend, APIs, databases, and external services—work together as expected under real usage conditions.

This type of testing is especially important because many critical issues only appear when the entire system is tested as a whole. Problems like broken user flows, incorrect configurations, or failures in third-party integrations are often missed by unit and integration tests. End-to-end testing helps teams catch these issues early, improving confidence before releasing features to production.

Tools like Keploy simplify end to end testing by automatically generating test cases from real application traffic. This reduces manual effort while keeping tests aligned with actual user behavior, helping teams deliver more reliable and stable software releases.

Read the full guide here: https://keploy.io/blog/community/end-to-end-testing-guide