Scaffolds are a tool by which you can very rapidly create basic user interfaces for editing the contents of a database table. By default, a single scaffold creates events that can do the following:
Display a "master list" of records in a table
Display an editing form capable of editing both a record's data and its relations to other tables (one-to-many and many-to-many)
Display a read-only view of a record
Update a record's data
Delete a record
By learning to properly use scaffolds and modify the code they produce, you can greatly reduce your development time for database-driven tasks.