CPU, or Central Processing Unit, is that part of a computer system or a hosting server which runs all of the calculations. Each CPU runs at a particular speed and the higher it is, the quicker everything will be processed, so if you host resource-demanding web programs on a web server, for example, a powerful processor shall allow them to be carried out speedier, which will significantly contribute to the overall user experience. The newer generations of CPUs have two and more cores, each of them running at a particular speed to guarantee a better and swifter performance. Such architecture permits the processor to control different processes at one time or several cores to manage 1 process if it needs extra computing power in order to be executed. However, other factors such as the amount of RAM or the connection that a given web server uses may also affect the efficiency of the websites hosted on it.