CPU, or Central Processing Unit, is that part of a computer system or a hosting server which performs all of the calculations. Every CPU operates at a particular speed and the larger it is, the swifter everything will be processed, so in case you host resource-demanding web apps on a server, for instance, a powerful processor will enable them to be performed quicker, which will greatly contribute to the overall user experience. The modern generations of CPUs have two and more cores, each running at a specific speed to ensure a much better and speedier performance. This sort of architecture makes it possible for the processor to handle a variety of processes concurrently or a number of cores to address a single process if it requires additional computing power to be executed. However, additional factors like the amount of RAM or the connection which a particular server uses can also affect the performance of the sites hosted on it.