Nodding is a common gesture where a person moves their head up and down, typically to indicate agreement or acknowledgment. This nonverbal communication is often used in conversations to show understanding or to encourage the speaker to continue. Nodding can also express approval or affirmation in various social contexts. In many cultures, nodding is a universal sign of consent, but its meaning can vary. For example, in some regions, such as Bulgaria, nodding can signify disagreement, while shaking the head indicates agreement. Understanding these cultural differences is important for effective communication in diverse settings.