What is common between aerobic and anaerobic respiration

Both aerobic and anaerobic respiration involve chemical reactions which take place in the cell to produce energy, which is needed for active processes. Aerobic respiration takes place in the mitochondria and requires oxygen and glucose, and produces carbon dioxide, water, and energy.

I think that the answer is that they both make ATP or energy, but one uses oxygen and the other does not. 

Very hard to understand