Imiquimod is primarily used as a topical medication for treating certain skin conditions. It is commonly applied to treat external genital warts, superficial basal cell carcinoma, and actinic keratosis. The chemical works by stimulating the immune system to attack abnormal or infected cells, helping to reduce or eliminate these conditions. It is often used when other treatments are not suitable or effective. Patients typically apply it directly to the affected area, following specific instructions to avoid irritation or adverse effects. Its immune-boosting properties make it a valuable option in dermatological care.