CPU, or Central Processing Unit, is that element of a computer or a server that runs all of the calculations. Each CPU operates at a specific speed and the higher it is, the quicker everything will be processed, so in case you host resource-demanding web applications on a hosting server, for example, a fast processor will allow them to be executed speedier, which will drastically contribute to the whole user experience. The newer generations of CPUs have two and more cores, each of them running at a particular speed to guarantee a much better and quicker performance. This type of architecture allows the processor to handle different processes concurrently or a number of cores to handle a single process if it requires additional computing power to be completed. However, other elements like the amount of RAM or the connection a given web server uses may also affect the overall performance of the web sites hosted on it.