"Ignorable content" can I select "Software Distribution"?

Under “Ignorable content” in one of my repositories, if I’m only using the yum repositories of foreman for patching can I select “Software Distribution” in the list - do I really need it?

Would you be able to expand on what “Software Distribution” means in this context?

Katello only allows 2 content unit types to be ignored for yum repositories: Specifically srpm and treeinfo.