CPU, or Central Processing Unit, is that part of a home PC or a server which executes all of the calculations. Every CPU functions at a certain speed and the higher it is, the sooner everything will be processed, so when you host resource-demanding web apps on a hosting server, for example, a powerful processor shall allow them to be executed quicker, which will drastically contribute to the whole user experience. The modern generations of CPUs have 2 and more cores, each one working at a certain speed to guarantee a much better and quicker performance. This type of architecture makes it possible for the processor to control different processes concurrently or a number of cores to handle a single process if it requires more computing power to be completed. However, other elements like the amount of RAM or the connection a certain server uses could also affect the efficiency of the websites hosted on it.