The C++14 standard is often referred to as a bugfix for C++11. It contains only a limited list of changes of which most are extensions to the new features in C++11. Below you can find an overview of the changes as they have been grouped on the isocpp FAQ with links to more detailed documentation.
constexpr[[deprecated]] attributestd:: typesstd::make_unique_t aliasesget<string>(t))greater<>(x))std::quotedstd::gets was deprecated in C++11 and removed from C++14std::random_shuffle is deprecated