For some concerns and some people, it may be a reasonable option. For others it is the wrong tool, and a good assessment should tell you which.
It is more often discussed for: shallow, rolling or atrophic acne scarring; uneven texture; enlarged-looking pores. Improvement, where it happens, is gradual, usually takes a course of sessions spaced at least 4 weeks apart, and varies a great deal between people. No result can be promised.
It is usually the wrong choice, or the wrong time, if: you have active acne, a skin infection or a cold sore in the area; you have a rosacea or eczema flare; you are pregnant or breastfeeding; you take medication that affects healing or clotting; or your main concern is pigmentation such as melasma, where other approaches are usually discussed first (see our guide to types of hyperpigmentation).
If you are deciding between needling and a chemical peel, this comparison explains how they differ. If your concern is texture in general, what contributes to uneven skin texture is a useful starting point.