CPU, or Central Processing Unit, is that component of a computer or a hosting server which runs each of the calculations. Every CPU functions at a specific speed and the higher it is, the sooner everything will be processed, so in case you host resource-demanding web applications on a hosting server, for instance, a fast processor shall enable them to be carried out much faster, which will drastically contribute to the whole user experience. The current generations of CPUs have two and more cores, each of them working at a certain speed to guarantee a better and faster performance. This sort of architecture enables the processor to control numerous processes at one time or a number of cores to control one process if it needs extra computing power in order to be completed. Of course, additional factors like the amount of RAM or the connection which a given web server uses may also affect the efficiency of the websites hosted on it.