Testing that actually catches problems before your users do — manual and automated, built into the development process instead of bolted on at the end.

What’s included

Manual testing across real devices and browsers, not just one developer’s laptop
Automated test suites (unit, integration, end-to-end) that run on every change
Performance and load testing before launch, not after it falls over
Bug tracking and clear reproduction steps your developers can actually act on
Regression testing so a fix for one thing doesn’t quietly break another

Good fit for

Teams shipping without a dedicated QA process, or a launch important enough that “it worked on my machine” isn’t good enough.