CPU, or Central Processing Unit, is that component of a PC or a web server which executes the calculations. Each and every CPU runs at a certain speed and the larger it is, the speedier everything shall be processed, so in case you host resource-demanding web applications on a hosting server, for instance, a fast processor shall enable them to be performed speedier, which will significantly contribute to the entire user experience. The newer generations of CPUs have two and more cores, each one functioning at a certain speed to guarantee a superior and speedier performance. Such architecture allows the processor to manage different processes concurrently or a number of cores to handle 1 process if it needs more computing power in order to be performed. Naturally, other elements such as the amount of RAM or the connection that a given web server uses may also affect the overall performance of the sites hosted on it.