CPU, or Central Processing Unit, is that component of a computer system or a hosting server which carries out each of the calculations. Each and every CPU functions at a specific speed and the bigger it is, the swifter everything will be processed, so if you host resource-demanding web applications on a web server, for example, a quick processor shall enable them to be executed more quickly, which will greatly contribute to the overall user experience. The modern generations of CPUs have 2 and more cores, each working at a certain speed to guarantee a much better and faster performance. This kind of architecture makes it possible for the processor to handle a variety of processes simultaneously or several cores to handle one process if it needs extra computing power to be executed. Obviously, other factors including the amount of RAM or the connection that a given web server uses could also affect the performance of the websites hosted on it.