The "try-catch" structure is a programming construct used to handle errors or exceptions that may occur during the execution of code. In a "try" block, a programmer writes code that might cause an error. If an error occurs, the program immediately jumps to the "catch" block, where the error can be managed or logged without crashing the entire application. This approach allows developers to create more robust and user-friendly applications. By anticipating potential issues and providing specific responses, such as displaying an error message or attempting a different action, the program can continue running smoothly, enhancing the overall user experience.