Google used to group the options from the search sidebar so you can quickly find the filters related to location, visited pages and the different ways to present search results. All these groups have been merged and Google only kept the group that lets you restrict the results to recent web pages. Google also removed the “related searches” view which showed a list of related searches at the top of the page and allowed you to compare the results for different searches.
The more interesting options now available include:
A kind of mindmap of your search with links that you can follow easily with related information on the right hand side of the search window. Good option for drilling down into information or looking at the search in a different way.
The Timeline search view shows a graph of your search term over time with key dates and events over time. You can see from this view the popularity of the search over a period of time. You can also click into the various date segments and drill down further into the information.
As you drilldown into each segment – it expands to show a more detailed timeline of the search term. Again you can drilldown even further. Good for finding date related search information.