Quite often in my case, there is no content that I would like to
provide on a dedicated page for a particular page. As a result
I would like to be able to disable the link at all or provide an
external link (e.g. to the conference page).
By default content is used as a subtitle - displayed right under Title
without extra formatting (to keep backward compatibility). However,
it doesn't look good to longer (multiline) content (margins, etc.).
For that cases there is an option to define the Subtitle parameter in _index.md
to render is as a subtitle and then .Content is rendered within the main tag
with better formatting.
zzossig