CPU, or Central Processing Unit, is that part of a computer or a server that carries out all of the calculations. Every CPU runs at a particular speed and the bigger it is, the faster everything will be processed, so in case you host resource-demanding web programs on a web server, for example, a quick processor will enable them to be carried out speedier, which will tremendously contribute to the overall user experience. The more recent generations of CPUs have 2 and more cores, each of them working at a certain speed to guarantee a superior and faster performance. This kind of architecture permits the processor to manage a variety of processes at one time or a number of cores to manage 1 process if it requires additional computing power in order to be executed. Needless to say, additional factors like the amount of RAM or the connection a given web server uses can also affect the overall performance of the Internet sites hosted on it.