Sets the Content-Type to application/json or multipart/form-data. The default Content-Type is application/json, which tells the server that the request body contains JSON data. Sets the Authorization header to protect your API and user data. For Sign Up, youâre setting a HTTP Basic Authentication header.
What information does Google hold on me? You can check what information is held about you under the Personal Info & privacy tab in the central column (circled), where all data including your email address, phone number, search history and settings are stored.
1 Google tracks all searches, and now with search becoming more and more personalized, this information is bound to grow increasingly detailed and user specific.  Clicks on search results â Not only does Google get information on what we search for, it also gets to find out which search results we click on.