Since our skin is estimated to be made up of almost 65% water, it's not surprising that ALL SKIN TYPES need moisture. It not just dry skin that craves moisture, actually normal and oily skin types need it too.
Moisturizers should be near the end of your skincare routine. Once you have cleansed, toned, exfoliated and used antioxidants or other targeted treatments selected for your specific skin issues, it's time to apply a moisturizer for your skin type or skin concern.
While those with oily or problem skin should choice an oil-free, serum based moisturizer; those with mature skin or dry skin would benefit from applying moisture in layers. This allows the skin to absorb and benefit from each product without becoming "drenched".