A database is a searchable collection of electronic documents. UMW subscribes to over 200 different databases.
Databases hold different types of documents. Most of the documents in the UMW databases are academic journal articles, but the databases also contain magazine articles, newspaper articles, and many other types of documents.
Most of the sources you find will include lists of citations (a.k.a. bibliographies). Think of these citations as low-tech hyperlinks -- they point you to other sources on the same topic. Follow those links! When you look at all the sources as a whole, they form an interlinked network of information. Your job is to explore that network and see what else is out there.
If you've found a good book or article, and you'd like to find newer sources that cite that particular book or article, type the title into Google Scholar. Then, on the results page, click "Cited by."