CPU, or Central Processing Unit, is that component of a home PC or a hosting server that executes all of the calculations. Each CPU runs at a specific speed and the bigger it is, the faster everything shall be processed, so in case you host resource-demanding web apps on a web server, for instance, a fast processor will allow them to be performed more quickly, which will tremendously contribute to the entire user experience. The more recent generations of CPUs have 2 and more cores, each operating at a specific speed to guarantee a much better and faster performance. This sort of architecture permits the processor to handle numerous processes simultaneously or a number of cores to manage a single process if it requires more computing power to be carried out. Naturally, other factors such as the amount of RAM or the connection a particular server uses could also affect the overall performance of the web sites hosted on it.