Almost anyone can publish their own web page, so it is important to critically evaluate the sources you find on the web. The CRAAP Test (linked below) can help.
Google Scholar can be very useful when you have exhausted library resources.
For example, if you find an article in a library database that does not have full text available, and you cannot find the article in full text in any other library database, the next step is to search for the article title in Google Scholar.
We do not recommend Google Scholar as the first stop for your research. Here's why:
The library pays for subscriptions to databases filled with high-quality content that you cannot access with Google Scholar.
Example: "Jim Davis"
Example: salsa recipe -tomatoes
Example: degree programs site:www.keuka.edu
Example: Try entering .org or .edu into the "site or domain" field.
Lifehacker's Top Ten Clever Google Search Tricks