A compass is a navigational tool that consists of a magnetized needle or a card with a magnetic needle that aligns itself with the Earth's magnetic field. It is used for determining directions, particularly north, south, east, and west. The needle of a compass points towards the Earth's magnetic north pole, allowing users to orient themselves and find their way in unfamiliar territories. Compasses are commonly used in outdoor activities such as hiking, camping, and navigation at sea. They have been an essential tool for explorers, adventurers, and sailors throughout history.