With internet privacy on many people’s minds in the wake of the Facebook controversy and the advent of the General Data Protection Regulation from the EU, it is more important than ever to be aware of and (semi) control what personal data corporations are collecting.
Luckily, Google offers a relatively open view on these issues. Google TakeOut is a service that allows you to download all the information you’ve given to Google over the years. If you see anything you’d rather they not have, you can use another Google service, fittingly named MyActivity, to manage and delete anything that seems objectionable.
For more information on these services and internet privacy in general, you can check out this New York Times article.