Databases provide access to articles. Some databases are subject specific and others cover multiple disciplines. Try your search terms in multiple databases to see what types of material you find.
You may see terms such as scholarly, popular, journals, trade publications, and peer-reviewed. If you need clarification of any of these terms, check out the guide on Evaluating Articles
If you can't find the full text of the article you're searching for, click the button to search the rest of the library's databases for it.