CPU, or Central Processing Unit, is that part of a computer system or a server that performs all the calculations. Each and every CPU functions at a specific speed and the bigger it is, the sooner everything shall be processed, so when you host resource-demanding web applications on a web server, for example, a quick processor will allow them to be carried out much faster, which will significantly contribute to the overall user experience. The newer generations of CPUs have two and more cores, each one working at a specific speed to guarantee a better and swifter performance. This type of architecture enables the processor to manage a variety of processes concurrently or several cores to handle 1 process if it needs more computing power to be performed. Needless to say, other elements such as the amount of RAM or the connection which a particular server uses can also affect the performance of the Internet sites hosted on it.