In October, the US tech giant announced that it would begin using its own analytics to track what people bought and when.
Amazon is only the latest company to do so.
Google, for example, used the data it collected to track people’s shopping habits, but it was then acquired by Amazon for $2.6 billion in 2014.
Amazon has a long history of using data to track its customers.
In 2014, it began collecting data about what people do online, including when they buy, when they shop, and when they get a gift.
That information was used to improve its shopping experience and, in some cases, to improve products and services.
Amazon has also experimented with its own technology to make shopping easier.
For example, it has been testing a “virtual grocery store” that allows shoppers to place orders online without leaving their homes.
Amazon also uses data from its own customer-service portal to improve customer service.
In January, the company revealed it had acquired two private companies, the New York-based company Veracity Analytics and the San Francisco-based software company CloudFlare.
Amazon acquired Veracity for $500 million in September 2015.
Amazon later said it had raised $2 billion in a private round led by private equity firm Blackstone.
Amazon’s analytics were also used to develop the company’s Alexa voice-activated assistant, which is now used by millions of people worldwide.