Goals of testing.

Testing objectives:

• Ensuring product quality: identifying defects and errors before release so that the product functions correctly and stably.
• Verifying compliance with requirements: ensuring that functionality is implemented according to specifications.
• Improving reliability and security: discovering vulnerabilities and unstable areas.
• Enhancing user experience: guaranteeing ease of use and predictability of operation.
• Reducing costs of fixing errors: identifying problems early in development, which is cheaper than fixing them after release.

For example, automated tests help quickly verify regressions when code changes, while manual testing assesses interface usability and non-standard scenarios.