CPU, or Central Processing Unit, is that element of a computer or a server that runs all the calculations. Each CPU runs at a certain speed and the larger it is, the swifter everything will be processed, so if you host resource-demanding web programs on a server, for example, a quick processor shall enable them to be performed much faster, which will drastically contribute to the entire user experience. The current generations of CPUs have two and more cores, each functioning at a certain speed to guarantee a superior and speedier performance. This kind of architecture permits the processor to manage different processes all at once or a number of cores to manage one process if it requires extra computing power in order to be carried out. Needless to say, other factors like the amount of RAM or the connection that a certain server uses could also affect the overall performance of the Internet sites hosted on it.