Google Scholar is a very large multidisciplinary database. Estimations are that GS contained about 160 million publications in 2013. Google Scholar focuses on the scholarly literature available on the Internet. This includes, articles, theses, books, abstracts found on the websites of academic publishers, professional societies, online repositories, universities and more. Google has a broader scope, and retrieves resources regardless of where online they come from. So search results found in Google will on the whole not be scholarly.