Glaciers shape landscapes through processes like erosion, transportation, and deposition. As glaciers move, they pick up rocks and sediments, grinding and scraping the land beneath them. This process, called glacial erosion, creates features like U-shaped valleys, cirques, and fjords. When glaciers melt, they deposit the material they carried, creating moraines, drumlins, and other landforms. Overall, glaciers play a significant role in shaping the Earth's surface over long periods of time.