CPU, or Central Processing Unit, is that part of a computer or a web server that performs all the calculations. Every CPU operates at a specific speed and the larger it is, the speedier everything will be processed, so when you host resource-demanding web apps on a server, for instance, an effective processor will allow them to be performed quicker, which will considerably contribute to the overall user experience. The more recent generations of CPUs have 2 and more cores, each of them operating at a particular speed to ensure a superior and swifter performance. Such architecture makes it possible for the processor to handle various processes all at once or a number of cores to manage 1 process if it requires extra computing power to be performed. Naturally, additional factors like the amount of RAM or the connection a given hosting server uses could also affect the efficiency of the websites hosted on it.