What is the difference between front-end and back-end development?

Front-end development refers to the part of web development that deals with designing and building the user interface of a website or web application that users interact with directly. This involves using technologies such as HTML, CSS, and JavaScript to create a visually appealing and responsive website. Front-end developers also ensure that the website is optimized for different devices and screen sizes. Back-end development, on the other hand, deals with the server-side of web development. This involves building the infrastructure that powers the website or web application, managing databases, handling user authentication and authorization, and performing other server-side tasks. Back-end developers use programming languages such as PHP, Ruby, Python, and Java to build the underlying logic and functionality of the website or web application. In summary, front-end development involves building the part of the website that users see and interact with, while back-end development involves building the part of the website that users don't see, but which powers the website's functionality. Both front-end and back-end development are essential for creating a fully functional and user-friendly website or web application.