CPU, or Central Processing Unit, is that element of a computer system or a hosting server which executes the calculations. Each and every CPU runs at a certain speed and the bigger it is, the swifter everything shall be processed, so if you host resource-demanding web applications on a hosting server, for instance, a powerful processor will enable them to be executed quicker, which will significantly contribute to the overall user experience. The more recent generations of CPUs have two and more cores, each one working at a specific speed to ensure a superior and quicker performance. This sort of architecture allows the processor to handle various processes concurrently or a number of cores to handle one process if it needs more computing power in order to be performed. Of course, additional factors like the amount of RAM or the connection a given server uses can also affect the efficiency of the websites hosted on it.