A Market Order is a type of order used in trading to buy or sell a security immediately at the current market price. This order guarantees execution but not the price, meaning that the transaction will occur at the best available price at the time the order is placed. Market orders are commonly used by investors who want to quickly enter or exit a position without delay. They are straightforward and typically executed faster than other types of orders, such as Limit Orders, which specify a price at which to buy or sell.