The document discusses the limitations of building location-based services that solely focus on a user's location. It summarizes that location often fails to account for:
1) A user's preferences over proximity
2) The multi-layered nature of places in a person's life
3) A user's experience and knowledge
4) Relevance, timeliness, and meaningfulness of information
5) Appropriateness when considering privacy and data quality issues.
The key message is that services should be built for people, not just locations, in order to provide truly useful and personalized information.