Software development is the process of designing, coding, testing, and maintaining software applications. It involves various stages including requirements gathering, system design, implementation, and debugging. Key methodologies include Agile, which emphasizes iterative progress and collaboration, and Waterfall, a linear approach. Effective software development requires a blend of technical skills, problem-solving abilities, and communication. Tools like version control systems and integrated development environments (IDEs) enhance productivity and code quality. Continuous learning and adapting to new technologies are crucial for success in this ever-evolving field.