1. The document introduces mashups and discusses examples of mashups in different domains like health, libraries, and search.
2. It describes what a mashup is by combining two or more applications to create a new application. Examples provided include WalkScore, media watch on climate change, and health mashups that combine data from different sources.
3. The document also discusses potential mashups in libraries and search and asks what users would like to mashup to make tasks easier, faster, and better. It concludes by briefly mentioning browser extensions and add-ons.