A pillow top on a mattress can offer a number of benefits. For one, it can provide an extra layer of cushioning and support, which can be especially beneficial for people with back pain or other joint issues. Additionally, a pillow top can help to keep the mattress feeling fresh and new for longer, as it can protect the underlying materials from wear and tear. Finally, a pillow top can also add a touch of luxury to a mattress, making it feel more inviting and comfortable.