The ability to require fields during a transition is one of the blueprint’s most powerful features. Think of all the use cases!
The blueprint provides a systematic and uniform method for ensuring that every Lead, Contact, etc. has all the right information at every status or stage. The user (often a salesperson) no longer has to remember every detail or question they need to ask of clients. The blueprint prompts them for all the essentials all the way through.
Apart from requiring fields, in this video, I create a post-transition field update, automated task, and some pre-transition criteria.