CPU, or Central Processing Unit, is that part of a personal computer or a hosting server which runs each of the calculations. Every CPU functions at a particular speed and the bigger it is, the faster everything shall be processed, so in case you host resource-demanding web programs on a web server, for example, a powerful processor will enable them to be carried out speedier, which will drastically contribute to the whole user experience. The modern generations of CPUs have two and more cores, each of them working at a specific speed to guarantee a better and faster performance. This kind of architecture enables the processor to manage different processes concurrently or a number of cores to address a single process if it needs more computing power to be performed. However, other elements such as the amount of RAM or the connection a particular server uses could also affect the efficiency of the web sites hosted on it.