CPU, or Central Processing Unit, is that part of a home PC or a hosting server that runs all the calculations. Every CPU functions at a particular speed and the bigger it is, the quicker everything will be processed, so in case you host resource-demanding web programs on a server, for example, an effective processor will enable them to be carried out more quickly, which will drastically contribute to the whole user experience. The current generations of CPUs have 2 and more cores, each of them functioning at a particular speed to ensure a better and faster performance. This sort of architecture makes it possible for the processor to handle various processes concurrently or a number of cores to manage a single process if it needs more computing power in order to be completed. However, other factors including the amount of RAM or the connection a given server uses may also affect the overall performance of the Internet sites hosted on it.