Searching for keywords is a great strategy to start looking for information about your topic. But a keyword search may give you too many or too few results.

Searching by subject headings is often the most effective and precise way to find relevant sources.

Subject headings describe the content of each source listed in a database. Indexers have created a list of words or phrases to uniformly describe the topics each source addresses.

Do you remember all the keywords we brainstormed for “obese” and “youth?  You could run many keyword searches using different combinations of these keywords. Or search for the subject headings: Obesity in children or Obesity in adolescence.