Webstorm: what does "excluded" really mean, regarding project subdirectories?

Question

In Webstorm, project subdirectories can be marked as "excluded". What are the full consequences of this flag? The Webstorm documentation stays quite vague about this. Does it affect debugging or deployment?

Many thanks for your explanations.

EDIT:

They say: "Excluded folders are not involved in indexing and therefore they are ignored while searching, parsing, watching etc." .

1. Why 'watching' - my gulp script does the watching ... .

2. And what is meant by 'etc' - more consequences ?

Answer 1

It will exclude these directories from search and indexing.