C++ Views were introduced with C++20 and extended with C++23 and C++26. They are lightweight objects that specify how to use (specific) elements of collections and their values. By composed into pipelines, programmers can easily define complex processing of collections of data.
However, the use of views also has pitfalls and traps. Therefore you should know about * The consequences of reference semantics * The problems of caching Views * The problems of using const with views * The Filter View Fiasco
This talk gives an overview about both the technology and where to pay special attention.