As Name suggest General purpose PCB Means Designer is free to make any circuit and place any component anywhere. It is used to test new ideas and in small scale electronics device production. PCB provides a means to hold all the solderable components together in one place as a single unit, but it does not provide the connection between components as provided by a specific purpose PCB using tracks. So, the users must make the connections using wires and solder joints.
General purpose PCBs have holes all over it in a grid like pattern so, one can place components anywhere as required.