CPU, or Central Processing Unit, is that part of a computer or a hosting server which carries out the calculations. Each CPU runs at a particular speed and the bigger it is, the quicker everything will be processed, so in case you host resource-demanding web applications on a server, for instance, a quick processor shall allow them to be performed faster, which will drastically contribute to the whole user experience. The new generations of CPUs have 2 and more cores, each one operating at a certain speed to guarantee a much better and quicker performance. Such architecture allows the processor to manage different processes all at once or several cores to handle a single process if it requires additional computing power in order to be executed. However, other factors such as the amount of RAM or the connection which a given server uses may also affect the efficiency of the websites hosted on it.