Nanocarriers are tiny delivery systems designed to transport drugs or other therapeutic agents directly to specific cells in the body. They are often made from materials like lipids or polymers and can be engineered to improve the effectiveness of treatments while minimizing side effects. By using nanocarriers, researchers aim to enhance the precision of drug delivery, making treatments more efficient. These carriers can be loaded with various substances, including chemotherapy drugs or gene therapies, and can be programmed to release their payload in response to specific triggers, such as changes in pH or temperature. This targeted approach holds promise for treating diseases like cancer more effectively.