Pulled Pork is what you get by pulling apart a pork shoulder or pork butt that has been slow cooked until it is fall apart tender.
Making pulled pork can be as easy as putting some rub on a pork butt and smoking it until it is ready to fall apart (usually around 200 F-205 F).
The process can be much more complex and includes injections, BBQ rubs, and wrapping the pork.