Full Stack Development refers to the practice of working on both the front-end and back-end portions of a web application. A full stack developer is proficient in various technologies and frameworks, allowing them to create a complete web application from start to finish. This includes everything from designing user interfaces to managing databases and server-side logic. In today's tech landscape, full stack developers are highly sought after due to their versatility and ability to handle multiple aspects of a project. They often work with languages such as JavaScript, HTML, and CSS for the front end, while utilizing Node.js or Python for the back end, making them invaluable in agile development environments.