Summary:
- The article discusses the author's experience with being targeted by in-app advertisements that seemed to know personal details about their life, raising concerns about data privacy and the extent of information collected by mobile apps.
- It explores how apps can gather data from users' devices and online activities to deliver personalized ads, even when the user has not explicitly provided that information.
- The article highlights the need for greater transparency and user control over data collection practices by mobile apps and the advertising industry.