CPU, or Central Processing Unit, is that part of a home PC or a web server that runs each of the calculations. Every CPU runs at a specific speed and the larger it is, the quicker everything will be processed, so when you host resource-demanding web apps on a web server, for instance, a quick processor will allow them to be performed quicker, which will greatly 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 ensure a better and quicker performance. This kind of architecture makes it possible for the processor to manage different processes simultaneously or several cores to handle a single process if it requires more computing power to be executed. Naturally, other factors such as the amount of RAM or the connection that a particular hosting server uses may also affect the performance of the websites hosted on it.