If you want to find information about any given topic or subject for your own benefit, such as when Mother's Day was first celebrated, then a popular or freely available search engine such as Google, AltaVista, Yahoo, or Teoma can be fine.
However, when your instructor assigns you a research paper, she or he will NOT want you to use a popluar search engine, or rely on Google for your research.
Let’s suppose you have been assigned to write a 6-page research paper using at least 5 "scholarly" sources (we’ll discuss what scholarly sources are in a little while). The paper has to be argumentative and focus on a debate or controversy that is at least 10 years old, such as technology in education.