Suggestopedia is a language teaching method developed by Georgi Lozanov that uses relaxation, music, and suggestive techniques to enhance learning. Key aspects of Suggestopedia include reading dialogues aloud to music while students sit comfortably, the teacher acting as an authority figure, and creating a stimulating classroom environment with decorations and lighting. The goal is to help students learn large amounts of vocabulary and language quickly in a relaxed state.