A magnetic compass is a navigational instrument that shows direction relative to the Earth's magnetic poles. It consists of a magnetized needle that can pivot freely on a pivot point. The needle aligns itself with the Earth's magnetic field, pointing towards the magnetic north, which helps users determine their orientation. Magnetic compasses have been used for centuries in navigation, aiding explorers and sailors in finding their way. They are simple to use and do not require any power source, making them reliable tools for outdoor activities like hiking and sailing. Understanding how to read a compass is essential for effective navigation.