CPU, or Central Processing Unit, is that element of a computer system or a server which performs all the calculations. Every CPU functions at a certain speed and the higher it is, the quicker everything will be processed, so if you host resource-demanding web apps on a server, for example, a powerful processor shall allow them to be executed speedier, which will drastically contribute to the overall user experience. The more recent generations of CPUs have 2 and more cores, each of them operating at a particular speed to ensure a superior and speedier performance. This type of architecture permits the processor to manage numerous processes all at once or a number of cores to manage a single process if it requires extra computing power to be executed. Needless to say, additional factors such as the amount of RAM or the connection a specific hosting server uses could also affect the efficiency of the web sites hosted on it.