CPU, or Central Processing Unit, is that component of a home PC or a hosting server that executes all the calculations. Every CPU operates at a certain speed and the higher it is, the swifter everything will be processed, so if you host resource-demanding web apps on a server, for instance, a quick processor will allow them to be executed speedier, which will considerably contribute to the entire user experience. The modern generations of CPUs have two and more cores, each of them operating at a certain speed to ensure a much better and faster performance. This kind of architecture makes it possible for the processor to control a variety of processes concurrently or a number of cores to address one process if it needs more computing power to be completed. Obviously, additional factors such as the amount of RAM or the connection that a specific web server uses may also affect the performance of the websites hosted on it.