Full stack web development refers to the development of web applications that involve both the front-end and back-end components of the application. The front-end component includes the user interface, which is responsible for the look and feel of the application that users interact with. This consists of the layout, design, and functionality of the website.

The back-end component of a full-stack web developer is responsible for the logic and processing of the data received and sent from the front end. This includes server-side programming, database management, and API development. The back end also ensures the security and scalability of the application.

A full-stack web developer is responsible for a web application's front-end and back-end development. They must be proficient in several programming languages, including HTML, CSS, JavaScript, and at least one back-end programmings language like Python, Java, or PHP. They must also have knowledge of databases like MySQL or MongoDB, as well as web development frameworks such as React, Angular, or Vue.js.

Full-stack web development is a complex process that requires a deep understanding of both front-end and back-end technologies. The successful development of a full-stack web application requires effective collaboration between the front-end and back-end teams to ensure that the application is user-friendly, fast, secure, and scalable.