CPU, or Central Processing Unit, is that component of a personal computer or a hosting server that carries out the calculations. Each CPU operates at a specific speed and the higher it is, the speedier everything shall be processed, so in case you host resource-demanding web apps on a web server, for example, a powerful processor shall enable them to be executed quicker, which will tremendously contribute to the whole user experience. The new generations of CPUs have two and more cores, each one running at a particular speed to guarantee a superior and faster performance. This kind of architecture makes it possible for the processor to handle numerous processes concurrently or several cores to handle one process if it needs more computing power to be executed. Of course, other factors including the amount of RAM or the connection that a particular hosting server uses may also affect the efficiency of the Internet sites hosted on it.