An air ionizer is a device that improves indoor air quality by releasing negatively charged ions into the atmosphere. These ions attach to airborne particles, such as dust, pollen, and smoke, causing them to clump together and fall to the ground or stick to surfaces. This process helps reduce allergens and pollutants in the air, making it cleaner and healthier to breathe. Many air ionizers are compact and can be used in various settings, including homes, offices, and cars. While they can help reduce odors and improve air quality, it's important to note that some models may produce ozone, which can be harmful in high concentrations. Always check for safety certifications when choosing an air ionizer.