Federal significance refers to the importance of a site, object, or event in relation to the broader history and culture of the United States. This designation often applies to places that have played a crucial role in national events, embody significant historical themes, or represent important aspects of American heritage. When a site is deemed to have federal significance, it may be eligible for protection and preservation under laws such as the National Historic Preservation Act. This can lead to recognition through programs like the National Register of Historic Places, ensuring that these important resources are maintained for future generations.