CPU, or Central Processing Unit, is that component of a computer system or a hosting server which executes all the calculations. Each and every CPU functions at a specific speed and the larger it is, the faster everything shall be processed, so if you host resource-demanding web programs on a server, for example, a powerful processor shall allow them to be performed quicker, which will considerably contribute to the overall user experience. The new generations of CPUs have 2 and more cores, each one functioning at a particular speed to guarantee a better and quicker performance. This sort of architecture enables the processor to handle numerous processes all at once or several cores to manage a single process if it requires additional computing power in order to be completed. Obviously, other factors including the amount of RAM or the connection a certain hosting server uses could also affect the overall performance of the websites hosted on it.