CPU, or Central Processing Unit, is that component of a PC or a web server which executes all of the calculations. Each CPU functions at a particular speed and the larger it is, the swifter everything will be processed, so when you host resource-demanding web apps on a hosting server, for instance, a powerful processor will enable them to be executed more quickly, which will greatly contribute to the entire user experience. The current generations of CPUs have 2 and more cores, each operating at a certain speed to guarantee a better and faster performance. Such architecture allows the processor to control a variety of processes at one time or a number of cores to control one process if it requires extra computing power in order to be carried out. Naturally, other factors like the amount of RAM or the connection that a specific web server uses may also affect the overall performance of the sites hosted on it.