Self-registration of external components (new in 7.3)

Questions
1

What is Self-registration of external components and how does it work?

New feature in Release: Litium 7.3.0

Litium version: 7.3

2

Some documentation can be found here: https://docs.litium.com/documentation/architecture/dependency-injection/conditional-registration-of-services

3

The name on the article is now consitent with the News-posts.
Thanks @NilsN and @marten.