Surveillance pricing can turn your own shopping data into a pricing input. A website may consider details such as location, browsing activity, purchase history, or other personal information when deciding which price or promotion to show you.
That does not mean every price change online comes from surveillance pricing. Prices can change because of inventory, timing, demand, shipping costs, promotions, or ordinary dynamic pricing. The harder question involves a different scenario: whether a company uses personal data to estimate what a particular shopper might pay.
