CPU, or Central Processing Unit, is that component of a computer system or a web server that performs the calculations. Every CPU functions at a particular speed and the larger it is, the faster everything will be processed, so when you host resource-demanding web programs on a server, for example, a quick processor shall allow them to be executed much faster, which will greatly contribute to the whole user experience. The current generations of CPUs have 2 and more cores, each of them functioning at a particular speed to guarantee a much better and faster performance. This sort of architecture allows the processor to control numerous processes at one time or a number of cores to manage 1 process if it needs more computing power to be completed. Naturally, other factors including the amount of RAM or the connection which a certain hosting server uses could also affect the performance of the websites hosted on it.