Ionizers are devices that produce ions, which are charged particles that can help improve air quality. They work by releasing negative ions into the air, which attach to positively charged particles like dust, pollen, and smoke. This process causes the particles to clump together and fall to the ground, making the air cleaner and easier to breathe. Many ionizers are used in homes and offices to reduce allergens and pollutants. Some models also have additional features, such as filters or fans, to enhance their effectiveness. While they can help with air purification, it's important to maintain them properly for optimal performance.