CPU, or Central Processing Unit, is that element of a PC or a server which carries out all of the calculations. Each and every CPU functions at a certain speed and the bigger it is, the quicker everything shall be processed, so if you host resource-demanding web programs on a hosting server, for instance, a quick processor shall allow them to be carried out speedier, which will tremendously contribute to the entire user experience. The more recent generations of CPUs have 2 and more cores, each operating at a certain speed to ensure a much better and speedier performance. Such architecture enables the processor to control a variety of processes all at once or several cores to handle 1 process if it needs more computing power to be carried out. However, other factors like the amount of RAM or the connection that a particular server uses can also affect the performance of the sites hosted on it.