Why choose library databases over Google? This librarian's answer might surprise you: FILTERS! When you search in Google and get a million results (literally a million), the best you can do is hope that Google's algorithm will steer you to something useful. But Google doesn't know you, or what you need for your research.
When you use library tools, like OneSearch or databases, you (the researcher) are in control. Do you only want online materials? Or materials published within a certain date range? Do you want to include -- or exclude -- certain topics. Filters help you do just that. You control how you'd like to narrow down your potential sources to help you find the *best* sources for your particular research question.
To learn more about how to use filters, Ask A Librarian