CPU, or Central Processing Unit, is that component of a computer or a web server that executes each of the calculations. Each CPU operates at a particular speed and the higher it is, the quicker everything shall be processed, so when you host resource-demanding web apps on a web server, for example, a quick processor will allow them to be carried out more quickly, which will greatly contribute to the overall user experience. The modern generations of CPUs have 2 and more cores, each of them functioning at a specific speed to ensure a superior and quicker performance. This type of architecture allows the processor to handle a variety of processes at one time or a number of cores to address 1 process if it needs extra computing power in order to be completed. Of course, other elements such as the amount of RAM or the connection which a particular hosting server uses could also affect the overall performance of the web sites hosted on it.