STL views in C++ are a powerful way to work with data structures and algorithms without the need to copy or modify the original data. Views allow for efficient access to data while preserving the original data integrity. One of the key benefits of using STL views is the ability to avoid unnecessary data copying, which can lead to improved performance and reduced memory usage. By using views, developers can manipulate and access data in a non-destructive manner, ensuring that the original data remains unchanged. This is particularly useful when working with large or complex data sets where unnecessary copying can lead to significant performance overhead. Another advantage of STL views is their support for lazy evaluation. Views provide a lazy approach to data processing, meaning that operations are only performed when the result is actually needed. This can lead to improved performance and reduced memory usage, especially when working with large data sets. In addition, STL views provide a convenient way to compose multiple operations together, allowing for the creation of complex data processing pipelines. This can lead to more concise and readable code, as well as improved maintainability and reusability of data processing logic. Overall, STL views in C++ provide a powerful and efficient way to work with data structures and algorithms without the need to copy or modify the original data. By leveraging views, developers can achieve improved performance, reduced memory usage, and more concise and maintainable code when working with large or complex data sets.