CPU, or Central Processing Unit, is that element of a computer or a server that carries out each of the calculations. Every CPU runs at a specific speed and the larger it is, the speedier everything will be processed, so when you host resource-demanding web programs on a web server, for example, a powerful processor will enable them to be carried out more quickly, which will greatly contribute to the whole user experience. The modern generations of CPUs have 2 and more cores, each working at a specific speed to guarantee a better and speedier performance. Such architecture permits the processor to manage a variety of processes simultaneously or several cores to manage one process if it requires additional computing power in order to be completed. Needless to say, other factors like the amount of RAM or the connection a given server uses may also affect the overall performance of the websites hosted on it.