CPU, or Central Processing Unit, is that element of a computer or a hosting server that runs each of the calculations. Every CPU functions at a specific speed and the bigger it is, the swifter everything shall be processed, so if you host resource-demanding web programs on a server, for instance, a quick processor shall enable them to be performed much faster, which will significantly contribute to the overall user experience. The new generations of CPUs have two and more cores, each of them operating at a certain speed to ensure a better and quicker performance. Such architecture enables the processor to handle a variety of processes simultaneously or several cores to control a single process if it needs extra computing power in order to be carried out. Naturally, additional factors including the amount of RAM or the connection which a particular web server uses could also affect the overall performance of the Internet sites hosted on it.