Electrostatic Charging
There are 4 methods of electrostatic charging.
In electrostatic charging it is the valence electrons, the outermost electrons, that are actually moving from one object to another.
Charging by Friction is a transfer of charge due to the contact between two objects. When you drag your feet across a carpet you are charging by friction. Note that being able to charge by friction requires the right materials and circumstances. If you drag your feet across concrete or if you drag your feet across a carpet on a humid day it is difficult to charge by friction.
Charging by Contact or Conduction is accomplished by first having an object that is not electrically neutral. Suppose you have a rod that has a net negative electrical charge. If this rod comes in contact with another object that is electrically neutral some of the extra electrons on the rod will move or conduct to the other object thus giving the second object a negative charge.
Charging by Induction is accomplished by first grounding an object and then using a charged second object to move charge on the grounded object.