"Oh" is an interjection commonly used in the English language to express a range of emotions, such as surprise, realization, or disappointment. It can also indicate understanding or acknowledgment in a conversation. The tone and context in which "oh" is used can significantly change its meaning. In addition to its emotional uses, "Oh" is often found in various forms of media, including music and literature. For example, songs like "Oh! Darling" by The Beatles or "Oh, What a Night" by The Four Seasons showcase its versatility in conveying feelings and experiences.