Aerobic respiration is the process by which oxygen-breathing creatures turn fuel, such as fats and sugars, into energy.
Respiration is a process used by all cells to turn fuel, which contains stored energy, into a usable form. The product of respiration is a molecule called ATP, which can easily use the energy stored in its phosphate bonds to power chemical reactions the cell needs to survive.
Aerobic respiration is respiration that uses oxygen as a reactant. Aerobic respiration is much more efficient, and produces ATP much more quickly, than anaerobic respiration (respiration without oxygen). This is because oxygen is an excellent electron acceptor for the chemical reaction.