CPU, or Central Processing Unit, is that element of a computer or a server which executes all the calculations. Each CPU runs at a particular speed and the larger it is, the quicker everything will be processed, so in case you host resource-demanding web programs on a hosting server, for instance, a fast processor shall enable them to be performed quicker, which will tremendously contribute to the overall user experience. The newer generations of CPUs have two and more cores, each one functioning at a specific speed to guarantee a better and speedier performance. This type of architecture allows the processor to handle different processes at one time or several cores to address 1 process if it requires more computing power to be executed. Of course, other variables like the amount of RAM or the connection which a certain web server uses could also affect the performance of the web sites hosted on it.