Testing helps find defects, provide confidence, and prevent defects. It involves both static and dynamic testing throughout the software development lifecycle. Software testing is like a driving test, where the tester evaluates if the software satisfies requirements and is fit for purpose by looking for faults, just as an examiner assesses a driver's abilities. Early testing is important so that defects can be found and fixed at lower cost stages of development. The objectives of testing include finding defects, gaining confidence in quality, and preventing defects.