Daniel Boone is often celebrated as a significant American frontiersman who played a crucial role in westward expansion in the late 18th century. Boone is best known for exploring and settling vast areas of what is now Kentucky. His exploration helped lay the groundwork for future settlers and opened up the frontier to further colonization. Boone's adventurous spirit and his ability to navigate the wilderness made him an iconic figure in American history, symbolizing the spirit of exploration and the drive for new opportunities beyond the Appalachian Mountains.