The Spy War: How the C.I.A. Secretly Helps Ukraine Fight Putin – The New York Times

Information about your activity on this service can be stored and combined with other information about you or similar users.

This is then used to build or improve a profile about you.

Your profile can be used to present advertising that appears more relevant based on your possible interests by this and other entities.

If you read several articles about the best bike accessories to buy, this information could be used to create a profile about your interest in bike accessories.

Such a profile may be used or improved later on, on the same or a different website or app to present you with advertising for a particular bike accessory brand.

If you also look at a configurator for a vehicle on a luxury car manufacturer website, this information could be combined with your interest in bikes to refine your profile and make an assumption that you are interested in luxury cycling gear.

An apparel company wishes to promote its new line of high-end baby clothes.

It gets in touch with an agency that has a network of clients with high income customers and asks the agency to create profiles of young parents or couples who can be assumed to be wealthy and to have a new child, so that these can later be used to present advertising within partner apps based on those profiles.