Use Google when you want to
- define the topic
- learn about terms and concepts you are unfamiliar with
- identify keywords and related topics that may help you with finding academic material
Use Reference Databases when you want to
- define the topic with credible information
- find avenues to do more research (bibliography)
- Narrow or broaden your search
Use Specific Library Databases when you want to
- find academic and scholarly resources
- find peer reviewed material
- use materials that others may have to pay for