CPU, or Central Processing Unit, is that component of a PC or a hosting server which carries out each of the calculations. Every single CPU runs at a certain speed and the higher it is, the swifter everything shall be processed, so when you host resource-demanding web programs on a web server, for example, a quick processor will allow them to be performed more quickly, which will considerably contribute to the whole user experience. The modern generations of CPUs have 2 and more cores, each one working at a particular speed to guarantee a better and faster performance. This type of architecture makes it possible for the processor to handle numerous processes all at once or several cores to manage a single process if it needs extra computing power to be performed. Naturally, other variables like the amount of RAM or the connection that a specific hosting server uses could also affect the efficiency of the web sites hosted on it.