CPU, or Central Processing Unit, is that element of a home PC or a server that runs all of the calculations. Every CPU runs at a particular 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 fast processor will enable them to be executed speedier, which will significantly contribute to the entire user experience. The current generations of CPUs have 2 and more cores, each one operating at a particular speed to ensure a much better and swifter performance. Such architecture enables the processor to control various processes concurrently or a number of cores to manage 1 process if it requires additional computing power to be executed. Of course, other elements including the amount of RAM or the connection which a specific hosting server uses can also affect the overall performance of the websites hosted on it.