The document discusses the General Data Protection Regulation (GDPR) which takes effect in May 2018 and imposes strict rules and heavy fines on companies regarding the collection and processing of users' personal data. It outlines several principles of GDPR including rights to access, correct and delete personal data. The document also provides strategies for app developers to comply with GDPR such as determining if all collected personal data is necessary, encrypting data, and informing users about data collection and sharing.