What are blueprints?

[Benjamin Slade]

I'm looking at creating a form in Confluence where certain fields will have lists of predefined choices.   I want the form to be updatable at a later time (eg. choose a different predefined value for a field and submit).

I think templates aren't what I want because once a page is created from a template, it's no longer associated with the template.

I'm looking at blueprints, but the page:

https://confluence.atlassian.com/doc/blueprints-323982376.html

says they are:

"a set of page templates with added functionality to help you create, manage and organize content in Confluence more easily".

What functionality?  And how does it help create, manage, and organize content?   Can you implement real forms, with predefined lists of values for fields, with the blueprints?