The Library subscribes to a number of databases covering the performing arts. While every database has its own conventions for searching, there are many common features shared by many of them. Here are some typical features you may find across different products.
Be selective when evaluating what you find in a search. Generally speaking, articles in scholarly journals (e.g. Journal of the American Musicological Society) may be considered more substanitive than more popular magazines (Opera News). Articles found in scholarly journals that are peer-reviewed can be considered to be authoratative. This means that the article was accepted following review by a scholars in the subject area of the content. Peer-reviewed articles contain bibliographic citations in the form of footnotes, bibliographies, etc. that back up the author's research and may lead you to further information.