CPU, or Central Processing Unit, is that component of a computer system or a web server which carries out each of the calculations. Each CPU operates at a specific speed and the higher it is, the quicker everything shall be processed, so in case you host resource-demanding web applications on a web server, for example, a powerful processor will allow them to be carried out quicker, which will significantly contribute to the entire user experience. The newer generations of CPUs have 2 and more cores, each of them functioning at a particular speed to ensure a superior and swifter performance. Such architecture makes it possible for the processor to control a variety of processes concurrently or several cores to address 1 process if it requires extra computing power in order to be performed. Naturally, other elements including the amount of RAM or the connection which a certain web server uses can also affect the overall performance of the Internet sites hosted on it.