More information: Library databases give you access to information that you cannot find on the general internet.
Quality: Library databases contain published information. This means there has already been some quality control and vetting of information prior to publishing, unlike the internet, where anyone can publish anything. Databases are not perfect--you should still critically evaluate everything--but you can have a little more confidence in what you find.
No additional cost: While free tools like Google Scholar might help you discover materials, you often cannot get them without paying. Trinity has already paid to subscribe to our databases, meaning there is no extra cost for you beyond what you already pay to attend Trinity.
More specific search options: Databases offer many ways to limit your search, such as dates, type of publication, subject/topic, and much more. This means you can create more specific searches than you can with a general search engine.