CPU, or Central Processing Unit, is that part of a home PC or a server that executes all the calculations. Every single CPU runs at a particular speed and the bigger it is, the speedier everything will be processed, so when you host resource-demanding web apps on a web server, for example, a powerful processor will allow them to be performed much faster, which will tremendously contribute to the whole user experience. The more recent generations of CPUs have 2 and more cores, each one functioning at a certain speed to guarantee a much better and quicker performance. Such architecture makes it possible for the processor to control a variety of processes all at once or several cores to control a single process if it requires more computing power in order to be performed. However, additional factors like the amount of RAM or the connection a specific hosting server uses could also affect the overall performance of the Internet sites hosted on it.