Palpitation refers to a rapid, irregular or pounding heartbeat that can be felt as an awareness of one's own heartbeat. It is often described as feeling like your heart is skipping a beat, fluttering or racing. Palpitations are usually harmless and can occur in response to various factors such as stress, exercise, caffeine consumption, anxiety, or certain medications. However, they can also be a symptom of a more serious medical condition that requires attention from a healthcare professional.