CPU, or Central Processing Unit, is that component of a computer or a server which executes the calculations. Every single CPU runs at a specific speed and the higher it is, the quicker everything shall be processed, so when you host resource-demanding web applications on a hosting server, for example, an effective processor shall allow them to be performed quicker, which will greatly contribute to the entire user experience. The more recent generations of CPUs have two and more cores, each one operating at a specific speed to guarantee a superior and swifter performance. Such architecture allows the processor to handle a variety of processes at one time or several cores to address one process if it requires additional computing power to be completed. Needless to say, other factors such as the amount of RAM or the connection which a specific server uses could also affect the overall performance of the web sites hosted on it.