Website development involves creating and maintaining websites. It includes front-end development (design, layout, user experience) and back-end development (server-side functionality, databases). Key steps in development include planning, designing, coding, testing, and launching. Technologies used are HTML, CSS, JavaScript for front-end, and PHP, Python, or Node.js for back-end. Responsive design ensures the site works on all devices. SEO and security are crucial for visibility and safety. Regular updates and maintenance keep the site running smoothly.