Crawling versus Indexing Filter


can you please define the difference between the indexing and crawling excluded path option?


Adding this regex to the crawling option does not check subdirectories of general at all, adding the regex to the excluded paths for indexing works though but creates a huge amount of unneccesarily crawled files.

Excluded URLs For Crawling does not crawl and index URLs.
Excluded URLs For Indexing does not index URLs, but crawls them.