CPU, or Central Processing Unit, is that component of a personal computer or a hosting server that performs each of the calculations. Each and every CPU operates at a certain speed and the higher it is, the quicker everything shall be processed, so if you host resource-demanding web programs on a server, for instance, a fast processor shall allow them to be performed quicker, which will tremendously contribute to the whole user experience. The more recent generations of CPUs have two and more cores, each operating at a particular speed to guarantee a superior and speedier performance. Such architecture makes it possible for the processor to handle different processes simultaneously or several cores to address a single process if it requires extra computing power in order to be performed. Obviously, other elements such as the amount of RAM or the connection a particular hosting server uses could also affect the performance of the Internet sites hosted on it.