An Rvalue Reference is a type of reference in C++ that allows developers to bind to temporary objects, known as rvalues. Introduced in C++11, it is denoted by two ampersands (&&) and enables efficient resource management by allowing the transfer of ownership of resources from one object to another without unnecessary copying. Rvalue References are particularly useful in implementing move semantics, which optimize performance by moving resources instead of copying them. This is especially beneficial in scenarios involving large data structures, such as std::vector or std::string, where copying can be costly in terms of time and memory.