CPU, or Central Processing Unit, is that element of a PC or a hosting server that performs each of the calculations. Each CPU operates at a particular speed and the larger it is, the speedier everything will be processed, so if you host resource-demanding web programs on a web server, for example, a fast processor will enable them to be carried out much faster, which will drastically contribute to the entire user experience. The newer generations of CPUs have 2 and more cores, each functioning at a certain speed to ensure a better and speedier performance. This sort of architecture makes it possible for the processor to handle a variety of processes at one time or several cores to control one process if it needs extra computing power in order to be completed. However, other factors such as the amount of RAM or the connection that a certain server uses could also affect the performance of the websites hosted on it.