Cilk Plus is an extension of the C and C++ programming languages designed to simplify parallel programming. It allows developers to easily write programs that can run on multiple processors, improving performance for computationally intensive tasks. The extension introduces keywords like "cilk_for" and "cilk_spawn" to help manage parallel tasks without complex threading code. This technology was developed by Intel and is particularly useful in applications such as scientific computing, graphics processing, and simulations. By providing a straightforward way to implement parallelism, Cilk Plus enables programmers to take advantage of modern multi-core processors more effectively.