A ladder is a portable structure used to climb up or down. It typically consists of two vertical supports connected by horizontal rungs. Ladders come in various types, including step ladders, extension ladders, and folding ladders, each designed for specific tasks and heights. They are commonly made from materials like wood, aluminum, or fiberglass. Ladders are essential tools in many professions, such as construction and maintenance, allowing workers to access elevated areas safely. When using a ladder, it is important to follow safety guidelines to prevent accidents, such as ensuring it is placed on a stable surface and maintaining three points of contact while climbing.