Online behavioral advertising (OBA) is a form of advertising that relies on data about users’ behavior (e.g., clicks, likes, voice commands) and uses artificial intelligence (AI) to place ads that... Show moreOnline behavioral advertising (OBA) is a form of advertising that relies on data about users’ behavior (e.g., clicks, likes, voice commands) and uses artificial intelligence (AI) to place ads that users may be interested in. Ads that AI chooses to display often leave users in awe and concern them about the potential of total surveillance. People using these services have (legitimate) expectations that tech companies or democratic institutions protect their interests. Indeed, the European Union (EU) heavily regulates OBA, requiring, for example, that companies have users’ consent before their surveillance. Yet, these ads monetize most “free” online services and turn companies like Alphabet and Meta into the world’s wealthiest. Therefore, the industry is incentivized to acquire consumers’ consent by any means necessary, often through manipulation. As almost everyone has encountered manipulative “cookie banners” online, many have started to doubt if EU law can effectively protect consumers from the growing power of the tech industry. This thesis builds a framework of manipulation, describes consumer manipulation via OBA, constructs a theory of the harms of this phenomenon, and analyses its boundaries in the EU legal framework. The thesis concludes that the EU framework can effectively safeguard consumers, anticipating that the enforcement of the Digital Services Act (DSA) and the Digital Markets Act (DMA) will put an end to consumer manipulation (and exploitation) via OBA. Show less