CPU, or Central Processing Unit, is that element of a PC or a server that runs all the calculations. Each and every CPU operates at a specific speed and the higher it is, the faster everything shall be processed, so in case you host resource-demanding web apps on a server, for example, an effective processor shall enable them to be carried out speedier, which will significantly contribute to the entire user experience. The newer generations of CPUs have two and more cores, each of them running at a certain speed to guarantee a much better and speedier performance. Such architecture makes it possible for the processor to control numerous processes concurrently or several cores to address one process if it requires additional computing power to be executed. Of course, additional factors like the amount of RAM or the connection that a certain server uses may also affect the performance of the sites hosted on it.