A "Gold Standard" refers to a monetary system where a country's currency or paper money has a value directly linked to gold. Under this system, the government agrees to convert currency into a specific amount of gold, ensuring that the currency maintains its value. This system was widely used in the 19th and early 20th centuries, providing stability in international trade. In a broader context, the term "Gold Standard" is also used to describe the best or most reliable benchmark in various fields, such as healthcare, education, or research. For example, a particular treatment may be considered the gold standard if it is the most effective method available, serving as a reference point for evaluating other options.