This document discusses solar tracking systems, which use devices to orient solar panels, reflectors, or lenses toward the sun to improve efficiency. It describes how tracking systems increase energy collection by keeping the optics pointed directly at the sun. Tracking can be done on one or two axes and is especially important for concentrated solar applications to precisely direct sunlight. The document outlines different types of solar collectors, tracking mechanisms, and how single and dual-axis tracking can each increase annual energy output.