What kind of information is in the government documents?
Government documents provide information on almost every subject you can think of. The information may come in the form of statistics, reports, brochures, pamphlets, maps, and or other materials (many of which are now online). Data from the U.S. Census an example of of government information; basically, if a government office or agency collected the data, the result can be considered a "government document." As such, you might find information on space exploration (NASA), endangered species (Environmental Protection Agency), homelessness (U.S. Department of Housing and Urban Development), and many other topics.
The type of information you'll find is often used in other resources, like books or articles, but there is much more available by going straight to the source of the information--the government agency that produced it. If you're having trouble finding what you need, check out the link below for a guide to government information or ask at the help desk.