CPU, or Central Processing Unit, is that element of a computer or a hosting server which performs the calculations. Every CPU operates at a particular speed and the bigger it is, the sooner everything will be processed, so when you host resource-demanding web programs on a server, for instance, an effective processor will enable them to be executed faster, which will drastically contribute to the whole user experience. The more recent generations of CPUs have 2 and more cores, each one working at a particular speed to guarantee a much better and speedier performance. This kind of architecture enables the processor to manage different processes simultaneously or a number of cores to handle a single process if it requires more computing power in order to be performed. Needless to say, additional factors including the amount of RAM or the connection which a particular web server uses may also affect the efficiency of the Internet sites hosted on it.