Obsidian Flavored Markdown adds a syntax option for adding Obsidian Callouts, which are nicely-formatted blocks that can be added to notes.
To make a callout, use the following code:
> [!note]
> Hello World!This renders:
> [!note]
> Hello World!
note can be replaced with some other
callout type. Obsidian provides the following out of
the box: abstract,
summary, tldr,
info, todo,
tip, hint,
important, success,
check, done,
question, help,
faq, warning,
caution, attention,
failure, fail,
missing, danger,
error, bug,
example, quote, and
cite.
Source: help.obsidian.md