Jojoba plays a similar role as sebum produced by our sebaceous glands. Sebum is an oily substance that helps to moisturize the skin by minimizing rapid dehydration. The more we age, the less sebum we produce, which explains why as the years go by your skin may feel and look drier and your scalp may also become scaly.
Applying jojoba to the skin and scalp is a great way to imitate the role of sebum when the body stops producing sebum naturally.
On the extreme end of the spectrum are people, whose sebaceous glands produce too much sebum, resulting in excessively oily skin and acne.
Even though jojoba is moisturizing, it is non-oily. This way, you can still apply it on your skin to balance the production of sebum without worrying about appearing oily.