CPU, or Central Processing Unit, is that part of a home PC or a web server that performs each of the calculations. Every CPU runs at a certain speed and the bigger it is, the speedier everything will be processed, so if you host resource-demanding web programs on a hosting server, for instance, a powerful processor shall allow them to be performed much faster, which will significantly contribute to the overall user experience. The more recent generations of CPUs have two and more cores, each working at a certain speed to ensure a better and swifter performance. This type of architecture permits the processor to control numerous processes all at once or a number of cores to address 1 process if it requires more computing power in order to be completed. Naturally, additional factors including the amount of RAM or the connection which a particular web server uses could also affect the performance of the websites hosted on it.