Processors are the main components for a PC.  These are in some way, responsible for everything a PC does. It determines which operating systems can be used, which software packages the PC can run, how much energy the PC uses, and how stable the system will be, among other things. If a PC has really good processors, then the PC will be expensive, because processors can determine the system cost.

All computer processors have the same principle.  They all take in signals in binary code (a code made up of '0's and '1's) to make instructions