CPU, or Central Processing Unit, is that component of a personal computer or a web server which carries out all the calculations. Each and every CPU runs at a certain speed and the bigger it is, the faster everything will be processed, so if you host resource-demanding web programs on a web server, for example, an effective processor shall allow them to be carried out speedier, which will tremendously contribute to the overall user experience. The newer generations of CPUs have 2 and more cores, each of them working at a certain speed to guarantee a much better and quicker performance. This type of architecture enables the processor to control numerous processes concurrently or a number of cores to handle one process if it requires additional computing power in order to be carried out. Naturally, other variables including the amount of RAM or the connection which a specific hosting server uses can also affect the efficiency of the sites hosted on it.