What type of solution do you need?
If you need more moisture in the air in your home, then you need a humidifier. If you only want to add fragrance to the air, and not moisture, then a diffuser is the proper product. Diffusers simply do not hold enough water to impact the humidity level of a room.

What is the benefit of more moisture?
Having the right humidity level in your home can help you breathe easier, temporarily relieving coughs and congestion. Moisture in the air can also help temporarily relieve dry skin, dry eyes and chapped lips. Proper humidity has important benefits for your whole house as well, including helping to prevent gaps in hardwood floors, cracks in wooden furniture and static electricity that can harm electronics https://thediyinfo.com/diffuser-vs-humidifier/

What if you want moisture and fragrance?
If you want it all, you’re in luck. Today’s humidifier technologies can often include aromatherapy capabilities. Honeywell offers warm mist and ultrasonic cool mist humidifiers that let you add essential oils to a compartment of the humidifier, delivering therapeutic fragrance as well as soothing moisture.