CPU, or Central Processing Unit, is that component of a home PC or a server which executes the calculations. Each and every CPU operates at a particular speed and the higher it is, the swifter everything shall be processed, so if you host resource-demanding web programs on a web server, for example, a fast processor shall allow them to be performed quicker, which will greatly contribute to the overall user experience. The modern generations of CPUs have 2 and more cores, each one functioning at a certain speed to ensure a much better and quicker performance. This type of architecture allows the processor to control numerous processes all at once or a number of cores to handle 1 process if it needs additional computing power in order to be executed. Obviously, additional factors such as the amount of RAM or the connection that a certain server uses could also affect the efficiency of the web sites hosted on it.