CPU, or Central Processing Unit, is that component of a computer or a hosting server that performs the calculations. Each CPU runs at a specific speed and the larger it is, the sooner everything shall be processed, so when you host resource-demanding web applications on a hosting server, for instance, a fast processor shall allow them to be carried out faster, which will significantly contribute to the entire user experience. The modern generations of CPUs have 2 and more cores, each of them functioning at a particular speed to guarantee a better and faster performance. Such architecture enables the processor to control various processes simultaneously or a number of cores to manage one process if it requires extra computing power to be completed. Of course, other variables such as the amount of RAM or the connection which a specific web server uses may also affect the overall performance of the Internet sites hosted on it.