CPU, or Central Processing Unit, is that element of a home PC or a web server which executes the calculations. Each CPU operates at a certain speed and the larger it is, the faster everything will be processed, so when you host resource-demanding web programs on a hosting server, for example, an effective processor will allow them to be carried out faster, which will drastically contribute to the entire user experience. The modern generations of CPUs have 2 and more cores, each of them working at a particular speed to ensure a better and quicker performance. This kind of architecture makes it possible for the processor to control different processes simultaneously or several cores to manage one process if it requires extra computing power to be completed. However, other elements like the amount of RAM or the connection which a particular web server uses may also affect the performance of the sites hosted on it.