CPU, or Central Processing Unit, is that part of a computer system or a web server that carries out all the calculations. Every CPU operates at a certain speed and the higher it is, the swifter everything shall be processed, so in case you host resource-demanding web applications on a hosting server, for instance, a powerful processor will enable them to be performed speedier, which will tremendously contribute to the entire user experience. The current generations of CPUs have 2 and more cores, each functioning at a specific speed to ensure a better and quicker performance. This type of architecture makes it possible for the processor to control different processes simultaneously or a number of cores to handle a single process if it requires more computing power in order to be carried out. Naturally, other elements like the amount of RAM or the connection that a certain web server uses can also affect the performance of the Internet sites hosted on it.