Google Search is the dominant internet search engine in the United States and can be used to supplement your research. Google also provides a suite of consumer, enterprise and other tech-related services.
Knowing how the Google Search Works
Google uses a number of algorithms to determine the best match to your query and presents results in a variety of categories, i.e. images, news, videos, etc.
Google doesn't sell search results but it does sell AdWords. Google AdWords consist of bids by advertisers and ranking criteria. Based on these factors, Google assigns a position to an AdWord search result relevant to your query.