CPU, or Central Processing Unit, is that component of a computer system or a hosting server that performs all the calculations. Each CPU functions at a certain speed and the bigger it is, the faster everything shall be processed, so if you host resource-demanding web programs on a hosting server, for instance, an effective processor shall allow them to be carried out much faster, which will considerably contribute to the entire user experience. The current generations of CPUs have two and more cores, each one working at a specific speed to ensure a superior and faster performance. This sort of architecture allows the processor to control numerous processes simultaneously or several cores to address one process if it needs additional computing power in order to be completed. However, other elements like the amount of RAM or the connection that a specific hosting server uses can also affect the performance of the sites hosted on it.