This is a framework where you list your AWS accounts with tags and your AWS Service Catalog products with tags or target accounts. The framework works through your lists, dedupes and spots collisions and then provisions the products into your AWS accounts for you. It handles the Portfolio sharing, its acceptance and can provision products cross account and cross region.
As a customer I would like to use regional end points when using STS so I can use opted in regions without having to set the account to use v2tokens.