Glaciers shape the landscape through processes such as erosion, transportation, and deposition. As glaciers move, they pick up rocks and debris, which grind against the underlying bedrock, causing erosion. This results in the formation of features such as U-shaped valleys, cirques, and moraines. Additionally, glaciers transport material as they flow, and when they melt, they deposit this material, creating landforms like drumlins and eskers. Overall, glaciers play a significant role in shaping the Earth's surface over long periods of time.