CPU, or Central Processing Unit, is that part of a personal computer or a server that performs the calculations. Each CPU operates at a particular speed and the bigger it is, the speedier everything shall be processed, so in case you host resource-demanding web apps on a server, for instance, a quick processor shall allow them to be performed more quickly, which will greatly contribute to the entire user experience. The modern generations of CPUs have 2 and more cores, each running at a specific speed to ensure a much better and quicker performance. Such architecture enables the processor to manage numerous processes at one time or several cores to manage one process if it requires extra computing power in order to be executed. Needless to say, other variables such as the amount of RAM or the connection that a specific server uses could also affect the overall performance of the web sites hosted on it.