A subspecialty is a specific area of expertise within a broader field. For example, in medicine, a doctor might be a general practitioner but can choose to focus on a subspecialty like cardiology or pediatrics. This allows professionals to gain in-depth knowledge and skills in a particular area, providing better care and specialized services to patients. In other fields, such as engineering or education, subspecialties can also exist. An engineer might specialize in structural engineering, while a teacher might focus on special education. These subspecialties help individuals tailor their careers to their interests and the needs of their communities.