CPU, or Central Processing Unit, is that part of a home PC or a web server which executes the calculations. Every CPU runs at a particular speed and the bigger it is, the faster everything will be processed, so in case you host resource-demanding web programs on a hosting server, for example, a quick processor shall enable them to be executed faster, which will drastically contribute to the overall user experience. The current generations of CPUs have two and more cores, each working at a certain speed to guarantee a better and quicker performance. This kind of architecture permits the processor to manage various processes at one time or a number of cores to control one process if it requires additional computing power to be carried out. Needless to say, other variables such as the amount of RAM or the connection which a particular server uses may also affect the overall performance of the Internet sites hosted on it.