The privacy implications of personalized ads revolve around the collection and use of personal data. While personalized ads enhance relevance and user experience, they raise concerns about user privacy, consent, and data security. Companies often gather detailed information through tracking technologies, such as cookies, to create user profiles. This can lead to potential misuse of sensitive information and breaches of trust. Regulations like GDPR aim to protect user data rights, necessitating transparency and consent in data collection practices. Balancing effective advertising with user privacy remains a critical challenge for advertisers.