Google is still the go-to for most student research. If you are going to "Google It" be smart about it and use Google's Advanced Search features.
Use the following Boolean operators to refine your search results.
example: vikings NOT football will eliminate all football results
example: cars OR automobile will look for both the word car and the word automobile
example: "World War II" will look for pages that have these words exactly as you type them
example: SITE:edu will only return results from educational domains
You can combine these operators to get more relevant results.
example: "World War II" or "World War 2" weapons SITE:edu NOT tanks
For more search operators, check out this list from Google.