Front-End Development and Back-End Development are terms that describe two aspects of how software is built, and understanding them helps in cross-disciplinary collaboration. The Front-End is everything that the user directly interacts with in a digital product — essentially the user interface. Front-end developers build the visuals and interactions (using technologies like HTML, CSS, and JavaScript for web) to implement the design that UX/UI designers create. The Back-End refers to the behind-the-scenes functionality on the server side, including databases, servers, and application logic. Back-end developers ensure the app can fetch data, handle transactions, and apply the business rules. From a UX perspective, while designers focus on front-end elements (layout, buttons, flows), they also must be aware of back-end capabilities and limitations. For example, if a designer envisions a personalized feed, the back-end must provide the appropriate data and logic to support that feature. In summary: Front-end is what users see and touch; back-end is what processes and delivers the information — both need to work together for a seamless user experience.