The Grammar Translation Method was developed in the 18th century as a way to teach modern languages in schools. It was adapted from how classical languages like Greek and Latin were studied, focusing on detailed grammar study and translating texts word-for-word. Key features include translating all sentences and texts between the target and native languages, memorizing long vocabulary lists without use, emphasizing grammar rules over communication, and not requiring teachers to speak the target language. While still used today in some traditional schools, major limitations are a lack of focus on developing oral skills and communicating in the target language.