Spring tides are the highest and lowest tides that occur when the Earth, the Moon, and the Sun are aligned. This alignment happens during the full moon and new moon phases, resulting in a greater gravitational pull on the Earth's oceans. As a result, the difference between high and low tide is more pronounced during these times. These tides are not related to the season of spring but rather the concept of 'springing forth' due to the increased tidal range. Understanding spring tides is essential for navigation, fishing, and coastal management, as they can significantly impact marine activities and ecosystems.