Search Options, lets you slice and dice your results and generate different views to find what you need faster and easier. “We’re continually thinking of new search features to help users find information more quickly and easily. The idea for the Search Options panel originated as a way to accommodate the functionality offered by these new features within the search results page. While it might seem like the panel was simple to put together, a lot of collaboration between design, research, and engineering happened behind the scenes in order to produce the best experience possible,” said Google blog in behind the scenes of the Search Options panel post.