One of the best features of Google's advanced search is the ability to limit your search to the areas of the web where the information is most reliable, such as education sites or government sites. The shortcut for this is to add site:edu or site:gov to your regular Google search.
For example, if you conduct an ordinary Google search for nutritional supplements, most of your top results will be commercial (.com) sites trying to sell you vitamins. If you search for nutritional supplements site:gov , the top results (except for the sponsored ads) will be sites such as the National Institute of Health and the Food and Drug Administration, which are authoritative, unbiased sources that are not trying to sell you anything. If you search for nutritional supplements site:edu, your top results will be from universities providing research on nutritional supplements.
Learn more about Advanced Google Searching from this self-paced tutorial: Google Search Tips.
On the web, it can be difficult to tell what type of source you’re looking at and whether or not it’s something that would provide quality evidence for your assignment. This video will help you look more critically at your own search results.