By default, Google stores a history of the web searches you perform and the websites you visit while signed in to your account. It uses this data to provide better search results and recommendations. However, if you would prefer that Google not record this information, you can pause storage of your Web & App Activity.
The Google Dashboard brings information from the different Google products you use onto one page, making it easy to see what information Google is storing about you. It's organized by product, so you can see how many files you have on Google Drive, what posts you've shared on Google+, and more. You can also access additional privacy settings for some services like YouTube and Gmail.
Watch the video below from Google for an overview of the Google Dashboard.