Chief Justice John Roberts asked the city's lawyer how long he needs to switch off his trigger lock (which requires entering a three-digit code) when a criminal is climbing through the window.
In this case, the ZIP code tied to your account or information from your phone's GPS could trigger the service to provide local news or updates about a hometown sports team.
For example, when a user visited a website that had code for one tracking technology, the data collection would call out to and trigger other tracking technologies that weren't embedded on the site.