CPU, or Central Processing Unit, is that part of a PC or a hosting server that carries out all the calculations. Every single CPU operates at a certain speed and the higher it is, the quicker everything shall be processed, so in case you host resource-demanding web apps on a web server, for instance, a quick processor will enable them to be performed more quickly, which will significantly contribute to the overall user experience. The more recent generations of CPUs have two and more cores, each of them operating at a particular speed to guarantee a much better and faster performance. This sort of architecture permits the processor to manage different processes concurrently or a number of cores to address one process if it requires more computing power in order to be completed. Naturally, additional factors including the amount of RAM or the connection which a particular web server uses can also affect the efficiency of the sites hosted on it.