A page called "Purchases", Google has a list of info about your buying habits

Another "probably" consumer privacy leaked by Google, Google tracks a lot of what you buy, even if you purchased it elsewhere, like in a store or from iTunes, Alibaba or Amazon.

Gmail inbox has been scanned privately by Google system, Last week, CEO Sundar Pichai wrote a New York Times op-ed that said "privacy cannot be a luxury good." But behind the scenes, Google is still collecting a lot of personal information from the services you use, such as Gmail, and some of it can't be easily deleted. The main purpose is to use the data for ads related algorithmic 

A page called "Purchases " shows an accurate list of many — though not all — of the things I've bought dating back to at least 2012. I made these purchases using online services or apps such as Amazon, iTunes, Steam, DoorDash or Seamless, or in stores such as Macy's, but never directly through Google.

But because the digital receipts went to my Gmail account, Google has a list of info about my buying habits. Google scanned the digital receipts that you've sent directly to Gmail inbox