The key principles of clean code include readability, simplicity, maintainability, and consistency. By adhering to these principles, developers can improve software quality by making code easier to understand, modify, and debug. Clean code reduces complexity, enhances collaboration among team members, and minimizes the likelihood of introducing bugs or errors during development. For individuals looking to deepen their understanding of software quality practices, enrolling in a reputable software testing training in Noida, Delhi, Lucknow, Meerut or other cities in India can provide valuable insights and practical skills for ensuring the reliability and effectiveness of software applications.