CPU, or Central Processing Unit, is that element of a PC or a hosting server which carries out all the calculations. Every single CPU runs at a specific speed and the larger it is, the quicker everything shall be processed, so in case you host resource-demanding web apps on a web server, for instance, a powerful processor will enable them to be performed speedier, which will greatly contribute to the overall user experience. The modern generations of CPUs have two and more cores, each functioning at a certain speed to ensure a much better and faster performance. This type of architecture makes it possible for the processor to handle different processes concurrently or several cores to control 1 process if it needs additional computing power in order to be performed. Obviously, other variables including the amount of RAM or the connection which a given hosting server uses could also affect the efficiency of the websites hosted on it.