Expertise refers to a high level of knowledge or skill in a particular area, often gained through extensive experience and education. For example, a doctor has expertise in medicine, allowing them to diagnose and treat illnesses effectively. This specialized knowledge sets experts apart from novices, as they can make informed decisions and solve complex problems in their field. People often seek out experts for guidance, whether it's a teacher helping students learn or a chef creating delicious meals. Expertise is valuable because it builds trust and confidence, ensuring that individuals receive the best possible advice and solutions in various situations.