Software development is the process of designing, creating, testing, and maintaining software applications. It involves several stages, including planning, where requirements are identified and project scope is defined; design, which focuses on architecting the software and its user interfaces; development, where code is written and features are implemented; testing, to verify functionality and eliminate bugs; deployment, which involves releasing the software to users; and maintenance, where updates and fixes are made post-launch. Various methodologies, such as Agile, Waterfall, and DevOps, guide the process, and a range of programming languages and tools may be used. The ultimate goal is to create efficient, reliable, and user-friendly software that meets the needs of its users.