The document discusses how to use United States census records for genealogy research. It explains that the census is conducted every 10 years and records are released to the public after 72 years. This makes the 1940 census recently available. It provides details on what information the census contains and how to access records from the 1900-1940 censuses through the National Archives website or paid genealogy websites. Tips are given for searching census records, like anticipating name variations.