The main purpose of a compass is to provide navigational guidance by indicating the cardinal directions: north, south, east, and west. Utilizing the Earth's magnetic field, a compass has a magnetized needle that aligns itself with magnetic north, helping users orient themselves and find their way. Compasses are essential tools for outdoor adventurers, sailors, and pilots, ensuring safe and accurate navigation across various terrains and conditions. Despite advancements in technology, such as GPS, the compass remains a trusted backup for navigation.