CPU, or Central Processing Unit, is that part of a personal computer or a web server which executes all the calculations. Each and every CPU runs at a specific speed and the larger it is, the faster everything will be processed, so in case you host resource-demanding web programs on a hosting server, for instance, a powerful processor shall allow them to be executed faster, which will significantly contribute to the overall user experience. The modern generations of CPUs have 2 and more cores, each one operating at a particular speed to guarantee a superior and faster performance. This kind of architecture permits the processor to manage different processes concurrently or a number of cores to control 1 process if it requires more computing power in order to be carried out. Of course, other variables including the amount of RAM or the connection which a particular server uses could also affect the overall performance of the websites hosted on it.