Articles+ is what librarian call a federated database, which means that it searches many, many databases across disciplines. It's a great first start if you are not familiar with the databases for a particular discipline and usually returns more than enough results for a writing seminar paper.
The name is slightly deceiving because in addition to scholarly journal articles Articles+ also has book chapters, newspaper articles, e-books, conference proceedings, book reviews, datasets, government documents, media, etc. It, however, would not be my first stop for items other than scholarly journals articles.
Hot Tips for Articles+
The Library has many resources including online articles! Use this search bar to get access to thousands of scholarly reviewed articles.