CPU, or Central Processing Unit, is that element of a PC or a server which carries out each of the calculations. Every single CPU operates at a specific speed and the larger it is, the faster everything shall be processed, so in case you host resource-demanding web applications on a hosting server, for instance, a fast processor will enable them to be executed much faster, which will tremendously contribute to the whole user experience. The new generations of CPUs have 2 and more cores, each of them operating at a certain speed to guarantee a better and swifter performance. This sort of architecture permits the processor to handle different processes at one time or a number of cores to manage a single process if it requires additional computing power in order to be carried out. However, other variables like the amount of RAM or the connection a certain web server uses may also affect the efficiency of the Internet sites hosted on it.