Why Ads Follow You for Products You Have Never Bought

Internet users may be surprised to see adverts for products they have only considered buying or viewed online, even when they have never placed an order. A purchase, however, is not necessary for advertising systems to identify a potential interest.

Platforms can use signals such as searches, pages visited and interactions with posts or adverts to infer what might appeal to a user. These actions can help shape the advertising someone sees without them explicitly saying they want a particular product.

Tracking technologies, including cookies and advertising pixels, can also help link browsing activity to later adverts. When someone views an item on a shopping website, that visit may be used to show them an advert for the same product elsewhere, a practice known as retargeting.

Other recommendations rely on predictions rather than a direct visit to a product page. Advertising systems may draw on a user’s previous activity or patterns among people with similar interests, making an advert feel unusually well timed. Its appearance alone does not establish exactly how the interest was inferred.

Users seeking more control can review personalised advertising settings, limit app tracking permissions and manage browser cookies. These steps can reduce some forms of tracking, though they do not necessarily stop adverts from appearing.