CPU, or Central Processing Unit, is that component of a home PC or a web server which runs each of the calculations. Each and every CPU operates at a certain speed and the higher it is, the faster everything shall be processed, so if you host resource-demanding web applications on a server, for instance, a quick processor shall enable them to be carried out much faster, which will greatly contribute to the whole user experience. The newer generations of CPUs have 2 and more cores, each one working at a certain speed to ensure a superior and faster performance. This sort of architecture makes it possible for the processor to handle different processes all at once or several cores to handle one process if it requires additional computing power to be performed. Obviously, other elements including the amount of RAM or the connection a particular server uses may also affect the performance of the websites hosted on it.