The purpose of this chapter is to prepare you for tasks that were not covered in the book. It provided introductions to numerous topics. You read about creating custom template tags and filters, using raw SQL queries and generic views. You also learned about several Django sub-frameworks. These included Flatpages for serving static content, sites for hosting multiple web sites in one Django instance, Sitemaps for exporting a search engine map, and several useful template filters. When a need arises for a certain feature, you now know where to look in order to find a framework that helps you implement the feature quickly and cleanly.
The chapter also gave some ideas that you may want to implement into the bookmarking application. The ideas included a message system, a subscription system, and tracking user activity with scores. Working on these features will give you more opportunities to experiment with Django and extend your knowledge of its frameworks and inner workings.