Your online profile is not always built on facts. It is shaped by technology companies and advertisers who make key decisions based on their interpretation of seemingly benign data points: what movies you choose watch, the time of day you tweet, or how long you take to click on a cat video.

Following Panoptykon’s General Data Protection Regulation (GDPR) complaint against one of the biggest Polish news website, Interia.pl – the Polish Data Protection Authority has confirmed that online publishers should give users access to their advertising profiles generated for the purposes of delivering behavioural ads.

A brief introduction to the types of ads we encounter online — and what they know about us