CPU, or Central Processing Unit, is that part of a PC or a server that performs all the calculations. Each and every CPU functions at a certain speed and the higher it is, the faster everything shall be processed, so when you host resource-demanding web applications on a server, for example, a powerful processor shall allow them to be executed faster, which will drastically contribute to the overall user experience. The current generations of CPUs have 2 and more cores, each of them running at a particular speed to guarantee a better and faster performance. This kind of architecture enables the processor to handle various processes all at once or several cores to handle a single process if it needs additional computing power to be completed. Naturally, other elements such as the amount of RAM or the connection a specific web server uses could also affect the overall performance of the sites hosted on it.