Let's go ahead and search for gender and adoption of children in Google.
Quickly scanning the results, there are a mix of links to articles on the topic interspersed with links about how to adopt children. Also, you will see your search produced over 56 million results. At the top of the page, Google provides you with a link called Scholarly Articles for Gender and Adoption of Children.
Clicking on that link will seamlessly take you directly into Google Scholar using the same search strategy. What do you notice about the dramatic change of results? Google's developers are essentially reinforcing the importance of searching in the right resource.
They are suggesting to you that your particular search query may be better answered using Google Scholar. In some, they are encouraging you to search in a smaller pool of information that they have called Google Scholar.