CPU, or Central Processing Unit, is that element of a home PC or a server that performs the calculations. Every single CPU operates at a particular speed and the larger it is, the faster everything shall be processed, so if you host resource-demanding web applications on a server, for example, a fast processor shall enable them to be performed much faster, which will greatly contribute to the overall user experience. The newer generations of CPUs have 2 and more cores, each functioning at a certain speed to ensure a better and faster performance. This type of architecture makes it possible for the processor to handle numerous processes concurrently or a number of cores to manage one process if it needs extra computing power in order to be completed. Obviously, other variables including the amount of RAM or the connection a given web server uses can also affect the overall performance of the sites hosted on it.