CPU, or Central Processing Unit, is that part of a computer or a hosting server that executes all of the calculations. Every single CPU runs at a particular speed and the bigger it is, the sooner everything shall be processed, so when you host resource-demanding web applications on a hosting server, for example, an effective processor will allow them to be executed speedier, which will drastically contribute to the overall user experience. The newer generations of CPUs have two and more cores, each working at a certain speed to ensure a superior and quicker performance. This sort of architecture permits the processor to manage numerous processes at one time or a number of cores to control one process if it requires additional computing power in order to be performed. Obviously, other factors including the amount of RAM or the connection which a particular web server uses can also affect the overall performance of the web sites hosted on it.