CPU, or Central Processing Unit, is that element of a PC or a web server that carries out all of the calculations. Each and every CPU functions at a particular speed and the higher it is, the swifter everything shall be processed, so in case you host resource-demanding web applications on a hosting server, for instance, an effective processor will enable them to be carried out more quickly, which will considerably contribute to the whole user experience. The modern generations of CPUs have 2 and more cores, each of them running at a certain speed to ensure a superior and swifter performance. This sort of architecture allows the processor to manage different processes concurrently or several cores to address 1 process if it needs more computing power to be completed. Naturally, other factors such as the amount of RAM or the connection which a specific web server uses can also affect the overall performance of the web sites hosted on it.